Answer the following question given this paragraph: 

Our lives are filled with light. Through vision, the most valued of our senses, light can evoke spiritual emotions, such as when we view a magnificent sunset or glimpse a rainbow breaking through the clouds. Light can also simply amuse us in a theater, or warn us to stop at an intersection. It has innumerable uses beyond vision. Light can carry telephone signals through glass fibers or cook a meal in a solar oven. Life itself could not exist without light’s energy. From photosynthesis in plants to the sun warming a cold-blooded animal, its supply of energy is vital.


Q: Life itself could not exist without what energy, which plays a vital role in photosynthesis?

 Choices:

- time energy

- spin energy

- magnetic energy

- light energy

A:
light energy
