To fill the other element's shell.
The inputs of photosynthesis are light energy, and matter in the form of water absorbed through the roots, and carbon dioxide absorbed through the leaves.
Therefore an input of photosynthesis from the choices given is,
Sunlight
Coal, oil, and natural gas are the 3 common fossil fuels
Answer:
a compound,typically a crystalline one,in which water molecules are chemically bound to another compound or an element