which of the following is used to transport materials into or out of the cell?\n\nlipids\nproteins\ncarbohydr…

Brief Explanations:

The cell membrane is composed of a phospholipid bilayer with various molecules embedded within it. While lipids form the structural barrier, proteins are specifically responsible for the transport of materials. Transport proteins, such as channel proteins and carrier proteins, facilitate the movement of ions, small molecules, and macromolecules across the membrane that cannot pass through the lipid bilayer on their own. Carbohydrates are primarily involved in cell recognition, and nucleic acids store genetic information.

Answer:

Proteins