Answer:
b.
Explanation:
The brain is an organ with no actual muscle except for the muscle tissue in the middle layer of the arteries that carry blood of the brain
hope it's help
Mountain Bike is the correct answer
Sound would travel faster in a thick piece of metal since the molecules are closer together. However, since there are more molecules, it would be quieter on the other side than the hollow metal.
will improve how fast your brain works and also help you learn just as fast
