Which is true of the light reaction of photosynthesis?
a. it breaks down atp.
b. it breaks down sugar.
c. it produces atp.
d. it produces sugar.

The correct option is C) It produces ATP.

Photosynthesis is the process by which green plants prepare their own food using CO₂ and H₂O in the presence of sunlight. It is primarily divided into light reaction and dark reaction.

The light reaction takes place in the thylakoid membranes of the chloroplast. In this reaction, energy from sunlight is captured by the chlorophyll pigment via a series of chemical reactions. This results in the formation of two high energy chemical compounds, which are ATP and NADPH.

These compounds are further used in the dark reaction for the synthesis of food ( which is glucose).

Thus, it produces ATP is true for the light reaction of photosynthesis.