It’s because they’re curious or they get peer pressured into doing it to “fit in.”
Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body. Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation. Arteries and veins are two of the body's main type of blood vessels.
Answer:
the grass grew taller and the hawk population declined
Explanation:
have a good day
It requires energy when a substance must travel against a concentration gradient through the membrane