Answer:
The correct answer is D. oxygen
Explanation:
The plasma membrane is selectively permeable which means it allows the selective molecule to pass through it. The charged molecule is passed mainly through active transport.
Water molecules pass through a type of passive diffusion called osmosis. Gases like oxygen and carbon dioxide move through simple diffusion. When oxygen moves in the cell carbon dioxide moves out of the cell. In diffusion, the molecule moves down their concentration gradient so no energy is needed in it. So the correct answer is D.
