Question

scientists observed that deer living in herds had a survival rate of 85% over the winter, while solitary deer in the same region had a survival rate of only 45%. which statement is best supported?

living in groups reduces and individual’s chances of survival because resources must be shared.

group behavior increases the likelihood of survival by helping individuals avoid predators and find food.

solitary animals always have higher reproductive success than animals that live in groups.

group behavior has no effect.

Explanation:

• The data shows herd - living deer (group behavior) have an 85% winter survival rate, while solitary deer have a 45% rate.
• Option A says group living reduces survival, which contradicts the data.
• Option C talks about reproductive success, but the data is about survival, so it's irrelevant.
• Option D says group behavior has no effect, but the survival rates differ, so this is wrong.
• Option B provides a reasonable explanation for why group behavior (herd living) would lead to higher survival (avoiding predators, finding food), which matches the observed survival rate difference.

Answer:

B. Group behavior increases the likelihood of survival by helping individuals avoid predators and find food.