In any ecosystem, the size of a population
a. may change over time.
b. only depends on the population's reproductive rate.
c. always stays the same.
d. only depends on the amount of resources available.

Option (A) is the correct answer.

Explanation:

A community where living organisms live and they create their own physical environment is known as an ecosystem.

The total living organisms of that community represents the population of ecosystem.

This population changes with change in time.

Hence, we can conclude that in any ecosystem, the size of a population may change over time.

d they tend to lose electrons and become cations.

explanation:

c. 7/3

step-by-step explanation:

a rational number is like pi- it is a repeating decimal.

a. is -1.8

b. 2.236068

c. 2.3333333333333333333

d.   is 3

i hope that ! =)