Question

consider the following claim about how a male purple - throated carib hummingbird can increase his reproductive success: defending flowers in a territory increases the chances that the male will mate with females. which of the following observations best supports the claim? when males defend their flowers from other birds, females visit the flowers more often. males, but not females, defend territories and fight to keep other birds away from flowers. females search for flowers that have more nectar to feed on.

Explanation:

The claim is that defending flowers increases mating chances. If females visit defended - flower territories more often when males defend them, it directly supports the idea that defending flowers can lead to more opportunities for mating, thus increasing reproductive success. The other options either focus on who defends (without a link to female visits and mating) or on female flower - searching based on nectar (unrelated to the male - defending factor).

Answer:

When males defend their flowers from other birds, females visit the flowers more often.