Chemical energy through the process of photosynthesis.
The plant is the organism that uses the sun’s energy and make it available to other organisms
A and b are cells so they definitely are not bacterium so c and d are bacterium I think. Your welcom.
Fire is not composed of cells.
Explanation: According to the cell theory, the cell is the basic unit of structure and function in living things. If something is not composed of at least one cell, it is not living.
