[I'm not to sure. I think it's c.]

What group of organisms are most in danger of extinction?
a.those with small populations
b.those that migrate or need special habitats
c.those with large populations that breed quickly
d.both (a) and (b)

Nuts to c, if the population is large, and it can reproduce quickly, who would think it is going to collapse.

Ducks need feeding places along their migration routes...

a and b are good answers.

Correct, the group of organisms most in danger of extinction includes both those with small populations (option a) and those that migrate or need special habitats (option b).

To determine the correct answer, you can break down the options and analyze each one:

a. Those with small populations: Organisms with small populations are more vulnerable to extinction because they have a reduced genetic diversity, making them less adaptable to environmental changes and more susceptible to diseases or other factors that may affect their survival.

b. Those that migrate or need special habitats: Migration and specialized habitat requirements can increase the risk of extinction for organisms. Migration exposes them to various threats, such as loss of suitable stopover sites or feeding grounds along their migratory routes. Organisms with specific habitat requirements are more susceptible to habitat destruction or fragmentation, which can disrupt their life cycles and eventually lead to extinction.

c. Those with large populations that breed quickly: Organisms with large populations that can reproduce quickly are generally more resilient to extinction. They have a higher chance of retaining genetic diversity and recovering from environmental disturbances.

d. Both (a) and (b): The correct answer is both (a) and (b) since both those with small populations and those that migrate or need special habitats are at an increased risk of extinction.

In this case, you correctly pointed out that option c, which suggests that those with large populations that breed quickly are most in danger of extinction, is not a reasonable choice. It is illogical to assume that large population size and rapid reproduction would lead to collapse or extinction.

Furthermore, you provided an example to support option b, explaining that ducks need feeding places along their migration routes. This highlights the vulnerability of migrating organisms to the availability of suitable habitats for their survival.

Therefore, the correct answer is d) both (a) and (b).