Answer:
Natural selection can cause microevolution (change in allele frequencies), with fitness-increasing alleles becoming more common in the population.
Explanation:
Answer - B. Kidney function is controlled by the blood's composition and hormones.
Reasoning - Well to start off the kidneys (main) purpose function is to clean your blood which is very Important with blood composition. Second It can also and will excrete it through urine which is pretty much what it does. Oh and also a little bit of hormones.
Melting ice caps and glaciers