Answer:
The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell. And that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.
Spearate cell into the protein cells
The epidermal tissue would form a boundary between the plant and it's environment so it probably wouldn't prevent asexual reproduction. Predation doesn't making sense because it's a plant, not an animal prey. Water loss is the best answer because the thick boundary prevents some water from evaporating.
