People often give into negative peer perspire bc they want to be accepted. Often they will have the Fear of being ridiculed. They don't want to offend their friends so they do things they might not normally do. They may not know who to say "no". Hope that helps :D
Answer:
skeletal system
Explanation:
blood cells are made in the bone marrow, which is part of the bones, which is part of the skeletal system
B is the answer to this question