Answer:
Periosteum, dense fibrous membrane covering the surfaces of bones, consisting of an outer fibrous layer and an inner cellular layer (cambium). The outer layer is composed mostly of collagen and contains nerve fibres that cause pain when the tissue is damaged.
I think the answer should be B as well hope it helps
Umm that really is a lot of words there but I will try to find a explanatory answer
The two upper chambers are the atria or auricles. They are the left and right atriums
The answer, I believe, would be C) A decrease in the wolf population - because the prey decreases, fewer wolves will be able to find food, which will lead to a decrease in their population.