Mass movement is caused by a. plucking and abrasion. b. gravity. c. chemical weathering. d. erosion and deposition.

b. Gravity, defined as the large movement of rock, soil and debris downward due to the force of gravity

Gravity can cause erosion and deposition. Gravity makes water and ice move. It also causes rock, soil, snow, or other material to move downhill in a process called mass movement.

The answer is Gravity

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the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.