Question:
Use evidence from the fact that a human requires sleep to be healthy to answer the following question. "Your immune system would be less effective if you didn't get enough of this"

Answer:
unconscious time

Question:
Use evidence from the fact that as the available water in an environment increases , the populations of organisms in that environment will increase to answer the following question. "If a lake begins to overflow after swelling from a storm, species within that water source likely"

Answer:
propagate

Question:
Use evidence from the fact that if the population of an organism increases then the ecosystem may become overpopulated with that organism to answer the following question. "Overpopulation may result"

Answer:
from a boom in reproduction of an organism