Answer:Exercise increases the rate at which energy is needed from food, increasing the need for both food and oxygen by the body. This is why when we exercise both pulse/heart rate and breathing rate increase.
Explanation: Hope this helps
Adenine, Guanine, Cytosine, Thymine?
Answer: B. It protects the inner organs
Explanation: For example, your ribs protect the lungs, heart, stomach, and more!
