Answer the following question given this paragraph: 

Figure 4.2 Ultimately, most life forms get their energy from the sun. Plants use photosynthesis to capture sunlight, and herbivores eat the plants to obtain energy. Carnivores eat the herbivores, and eventual decomposition of plant and animal material contributes to the nutrient pool.


Q: Ultimately, most life forms get their energy from this?

 Choices:

- heat

- earth

- food

- sun

A:
sun
