Photosynthesis enables plants to produce most of the organic molecules they need. this process requires all of the following reactants except

The question is incomplete, the complete question is:

Photosynthesis enables plants to produce most of the organic molecules they need . This process requires the use of all of the following reactants except

A. carbon dioxide

B. water

C. light

D. glucose

The correct answer is D (glucose)

Explanation:

Plants are unique set of organisms called autotrophs, because of their ability to make their own food in form of organic molecules. They do this through a process called PHOTOSYNTHESIS. Photosynthesis is the process by which plants synthesize food using sunlight.

Plants are able to perform this process of photosynthesis because of the possession of a green pigment which they use to capture the energy from sunlight, which they then use to power the breakdown of water molecule (PHOTOLYSIS) in the light stage of photosynthesis. They produce certain compounds (ATP, energy-carrier and NADPH, hydrogen carrier) which they use to reduce carbondioxide (CO2) that has been taken in via the stomata in their leaves. This overall process produces glucose (organic molecule), which they use as a source of fuel.

In a nutshell, the reactants are water, CO2 and light to produce glucose (product).