Es
what would be the most appropriate question for future research on the feeding habits of birds?
a)
do birds eat the same thing all year long?
how do bird seed' choices vary with bird species?
what types of seeds do birds prefer to eat in the spring?
how do the seeds eaten by birds in winter compare to seeds eaten in
spring?

I would the most appropriate question is "Do birds eat the same thing all year long?"

Explanation:

D. How do the seeds eaten by birds in winter compare to seeds eaten in

spring?

biology is the study of life. it is the study of living organism.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."