EVERYDAY SCIENCE

Detailed explanation-1: -Particles move across membranes by simple diffusion, facilitated diffusion, osmosis and active transport.

Detailed explanation-2: -Some of these ways are active transport, passive transport, osmosis, and diffusion. Active transport: The transport of molecules through the cell membrane from a region of low concentration to high concentration against the concentration gradient is called active transport.

Detailed explanation-3: -Only the smallest molecules like water, carbon dioxide, and oxygen can freely diffuse across cell membranes. Larger molecules or charged molecules often require an input of energy to be transported into the cell.

Detailed explanation-4: -So, the correct option is ‘Simple diffusion’.