The slow rate at which diffusion occurs over large distances.
Answer:
the answer would be solar energy in the rays of sunlight
Explanation:
The arrangement of specialized parts within a living thing is sometimes referred to as levels of organization. Cells, of course, are the first level of organization. In any multicellular organism, cells rarely work alone. Cells that are similar in structure and function are usually joined together to form tissues.
All of the above i think.
