I think it would be convection,conduction,and radiation.
A. movement of air into and out of the lungs
Answer:
produced during meiosis. Which is a type of cell division that reduces the number of chromosomes in a parent diploid cell by half.
Answer: c humans would find more efficient ways of growing crops
Explanation:
During exercise there is an increase in physical activity and muscle cells respire more than they do when the body is at rest. The heart rate increases during exercise. The rate and depth of breathing increases - this makes sure that more oxygen is absorbed into the blood, and more carbon dioxide is removed from it.