The plants will not be able to store light energy or capture light energy leading to inefficiency to produce food for the plants using photosynthesis, if the chloroplasts in a plant cell were destroyed.
Step-by-step explanation
The chloroplasts present in the cell of plants consists of chlorophyll which is responsible to capture light energy to start the process of photosynthesis in the light reaction stage.
If the chloroplasts were destroyed means there will be absence of chlorophyll which in-turn will lead to failure of storing or capturing light energy for photosynthesis.
Thus if the chloroplasts were destroyed, the plants will not be able to produce its food as the process of photosynthesis will not be occurring, finally leading to death of plant.