The correct answer is C. Boys and Girls Club of America
Answer:
umbilical cord and placenta
Explanation:
I The The answer is either b or d I hope it helps My friend Message Me if I’m wrong and I’ll change My answer and fix it for you
Answer: In one study, exercise stimulated the human brain's ability to maintain old network connections and make new ones that are vital to cognitive health. Other studies have shown that exercise increased the size of a brain structure important to memory and learning, improving spatial memory.