I really need help. Can someone try to order it in the way it happens by putting it in order by letter.

Explanation:
Photosynthesis is the process by which green plants take in carbon dioxide and water, in the presence of chlorophyll by using sunlight to make their own food, is called as photosynthesis.
Oxygen is released as a by product.
The formula for photosynthetic reaction is :-
[tex]\sf 12H_2O + 6CO_2 \underset{chlorophyll}{\xrightarrow{Sunlight}} C_6H_{12}O_6 + 6H_2O + 6O_2 \uparrow[/tex]