Question

Which statement about populations is true?
A. Populations are larger than communities.
B. Populations consist of biotic and abiotic factors.
C. Populations can increase or decrease with seasons.
D. Populations consist of only the animals in an ecosystem.

Answer 1

In biology, a "population" is a group of organisms, of the SAME species, that live in the same area, at the same time.

In other words,
a "population" could be a group of the same kinds of plants, or animals, in a certain area.
Like a population of bears in a forest, for example.

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To help you answer this question, I'll point out a fact:
birds migrate.

You know that, right?

I know almost nothing about birds,
but we do know that birds migrate.
When the seasons change,
birds will move from one place to another.

So, in the summer time, we might see lots of birds, in a certain area.
But in the winter time, there might be no birds, because they've all moved. Migrated.

Answer 2

To sum it up I think it is option C after reading "InYourHead's" answer

Answer 3

@gksriharsha

Wonderful.