In photosynthesis, carbon dioxide is reduced. This reduction occurs during the Calvin cycle. The energy for the reduction is gained from Light reaction.
Step-by-step explanation:
The pigment called Chloroplasts that are present in plants helps them in the conversion of light energy into chemical energy. This pigment contains electrons has higher energy that will be transported in the photosynthesis p[process.
The main source of this process to take place is energy that is obtained from sun. Chlorphylls abosrb the solar energy.The electrons in the chloroplast produces NADPH and ATP. This process is called as the light reactions as the main source of this reaction is light.