The questions & answer choices are attached.

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

All organisms contribute some water to the water cycle by conducting

Has regulatory areas for thirst, hunger, body temperature, water balance, and blood pressure