The answer to this is multicellular. Unicellular organisms' life processes all take place in the one cell which is their entire being - their entire existence - whereas multicellular organisms require specialized organs and organ systems to keep us alive.
Answer.
B. Multicellular
A Cell wall is what it says. It is a wall. Nothing is allowed to pass through. A Cell membrane on the other hand is like screen door. It has "Pores" that allow materials in and out.
A product of photosynthesis is glucose which is a sugar. This sugar(glucose) is food for the plants.
