Well, after carefully reviewing the question me thinks that "they" are looking for the following answer:
Reactants for photosynthesis to occur: Light, Chlorophyll, Oxygen (Water actually, but the oxygen is taken from the water...

)
Plant adaptation to produce glucose : The "Calvin Cycle". It's a light independent reaction that occurs in the stroma. The process is also called "carbon fixation"
See, I
did learn something in Biology class

.