The movement of carbon dioxide out of cells and oxygen into cells can best be explained by which process

The movement of carbon dioxide out of cells and oxygen into cells can best be explained by which process of DIFFUSION.

Explanation: Diffusion is a process by which movement of molecules, body fluids, exchange of gases takes place from the region of higher concentration to the region of lower concentration.

In the body exchange of CO2 and O2 is done in lungs by process of diffusion.

the answer is c. altitude. hope this ! #brainiac

actually the answer is c