Answer:
During exercise, your heart typically beats faster so that more blood gets out to your body. Your heart can also increase its stroke volume by pumping more forcefully or increasing the amount of blood that fills the left ventricle before it pumps.
Answer:
A theory is a group of hypotheses that prove a law is true.
Explanation:
A theory is an idea based on principles. A hypothesis is an explanation with limited evidence. Laws are the system of rules indicated for each country.
