Which of the following is a biotic factor of a water ecosystem?
a. green algae
b. sun energy
c. soil sediments
d. water temperature

answer; i believe that the correct answer is ; males are hemizygous for the x chromosome;

the correct answer is:

a population changes in response to a change in the environment.

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation: