Which of the following explains why selection can cause populations of organisms to change?
a. It teaches organisms how to survive better in their environments. b. It allows some organisms to survive and produce offspring while others do not.
c. It causes changes in organisms to help them in their everyday lives.
d. It chooses certain organisms with good traits over other organisms with bad traits.

c

Explanation:

selection helps organisms adapt and c makes the most sense

C.

It causes changes in organisms to help them in their everyday lives.

Explanation:

When conditions change, some species possess adaptations that allow them to survive and reproduce, while others do not. If the environment changes slowly enough, species will sometimes evolve the necessary adaptations, over many generations.

a sperm cell fertilizes an egg cell.

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.