Calculate the population. There is a flock

of 21 birds. 3 birds immigrate to the flock

but 9 emigrate.

A. Population grows; 15 birds in

the end

B. Population grows, 27 birds in

the end

C. Population shrinks; 15 birds in

the end

D. Population shrinks; 27 birds in

the end

C. Population shrinks; 15 birds in the end

Explanation:

Let us understand some of the given terms;

immigration is a form of migration in which organisms comes into a territory.

emigration is a form of migration in which organisms leaves a place

population is a group of organisms of the same species

Given:

Population = 21 birds

Immigrant = 3 birds

Emigrants = 9 birds

Population change = total number of birds + immigrant - emigrants

= 21 + 3 - 9

= 15 birds

The population will shrink giving 15 birds in the end