I believe that the answer is b
Answer:
Water moves through the Earth's Geosphere by surface runoff and infiltration.
Explanation:
Velocity is in relation to direction it is the speed plus direction it's going, and speed is distance over time
it should be the second one
Homeostasis. Human levels are kept at 7.
Evolution, specifically mutation.
Remember Darwin's birds on the Galapagos. Well, those birds are examples of new species coming from an old one.
See, once a group of birds left Ecuador and landed on one of the islands. In order to survive, they mutated to fit the island's lifestyle.
Later, birds from that island migrated to the others, and repeated the process. Soon, there will multiple species of finches, living together. All because of one finch.
So look for mutation or migration in your answer