Biology

The correct answer is: A.water, oxygen, and carbon dioxide.

These materials can move across a membrane via passive transport, which does not require energy. Passive transport occurs when molecules move from an area of higher concentration to an area of lower concentration, down their concentration gradient.

1.Water moves through the cell membrane via osmosis, a type of passive transport.

2.Oxygen and carbon dioxide are small, nonpolar molecules that can easily diffuse across the lipid bilayer of the cell membrane.<...