What is the relative humidity?​

Plzz hurry im being timed during times of vigorous physical activity, muscles require a constant supply of oxygen. how does the body respond to these needs? a. breathing rate and heart rate both decrease. b. breathing rate and heart rate both increase. c. heart rate decreases, but breathing rate remains stable. d. breathing rate increases, but heart rate remains stable.

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain

Acommon kind of mechanical weathering is called