Researcher Dr. Ales is interested in the effects of divorce on children's school performance. She gathers a sample of 1,000 children whose parents have recently divorced and tracks their academic performance over five years. This is an example of what kind of research

i believe she will have 25 quarters.

step-by-step explanation:

i believe

clean air is essential for health and survival

clean air provides nitrogen gas for plant respiration

clean air supplies oxygen that enables living organisms to breathe

hope this

i am brianly

sorry if this doesn't