I would think of a unicellular organism or a plant, but I'm not too sure on this one, Just trying to help :)
Answer:
It's producers because those are the one's that sell them to the consumers.
I'm not completely sure, but I'm fairly certain that the answer is B.
A cell membrane would most likely be close to an egg structure. A cell membrane is a selective permeable to ions and organic molecules and controls the movement of substances in and out of the cell.
The basic function of the cell membrane is to protect the cell from its surroundings. It consists of the lipid bilayer with embedded proteins.
