What will be the impact of exponential population growth on the Earth's atmosphere?

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.

the question isn't complete here so i can't right an answer '_'