The bystander effect explains why people are less likely to help when others are present. When more people are around, responsibility gets spread out, and each individual feels less personal obligation to act because they assume someone else will intervene. The situation also tends to feel less urgent in the moment, since people look to others to judge what’s happening (pluralistic ignorance), which can further dampen the impulse to help. The combination of diffusion of responsibility and reduced perceived urgency makes helping less likely as the group size grows. Other theories describe different motives for helping but don’t capture this specific dynamic. Social Exchange Theory focuses on weighing costs and benefits of helping, which can explain why someone might help or not in particular contexts but not the general drop in helping when bystanders are present. The Reciprocity Norm is the expectation that helping others will be rewarded by future help, and Equity deals with fairness in outcomes; both address willingness to help in a broad sense but not the reduced likelihood that occurs simply because more people are around.

The term Physiological Needs refers to the most basic biological necessities of life—food, water, warmth, rest, and other bodily requirements essential for survival. These needs sit at the bottom of Maslow’s hierarchy, meaning they must be satisfied before a person can focus on safety, relationships, esteem, or self-actualization. When these core resources are lacking, behavior is primarily driven by a search to meet them, which is why this option best captures the concept. External Locus of Control is about whether people see outcomes as controlled by external factors or by themselves. Flow describes a state of deep immersion and enjoyment in an activity. Cognitive Dissonance refers to the psychological discomfort that arises from holding conflicting beliefs or attitudes. None of these describe the basic survival needs that Physiological Needs covers.

The main idea here is how genetic influence shapes who we are. Traits that come from our genes — what we inherit from our parents — are described as nature. This term captures the genetic component that contributes to our characteristics, as opposed to nurture, which covers how environment and experience shape us. While heredity refers to the biological passing of genes from one generation to the next, the labeled concept for those genetic influences on traits is nature. So, when a trait is inherited due to genetics, it’s considered part of nature.

Maintaining your own culture while avoiding contact with the new culture describes a pattern of acculturation where you preserve your original customs, language, and identity and minimize interaction with the host society. This approach keeps boundaries clear by keeping engagement with the new culture very low while sustaining your native culture, which means low orientation toward the new culture but high maintenance of the original one. The other patterns involve different balances: integration means you keep your original culture while also engaging with the new one; assimilation means adopting the host culture and letting go of your original culture; and marginalization means losing both your original culture and contact with the host culture. An example would be a community that continues its traditions and language at home and within its own enclave, with little participation in the broader society.

During the toddler years, children push to do things themselves and test what they can manage, building a sense of will and independence. This is the period where autonomy becomes the central focus: they want to dress themselves, choose small tasks, and rely more on their own abilities. When caregivers support these efforts with patience and guidance, the child develops autonomy and a confident sense of mastery. If independence is met with harsh criticism, overcontrol, or constant doubt, the child may develop shame and doubt about their abilities and become hesitant to try new things. This stage typically unfolds around ages 1 to 3. For context, Trust vs Mistrust belongs to infancy, Initiative vs Guilt comes a bit later when the child eagerly plans and attempts new activities, and Industry vs Inferiority relates to mastering skills in the school-age years. The description given matches autonomy vs shame and doubt.