Answer the following question given this paragraph: 

Bears get their energy from their food. Brown bears eat a varied diet, from nuts and berries to fish and other animals. When bears eat a berry, they are obtaining energy that the plant originally captured from the sun. Even when a bear eats another animal, the energy in that animal ultimately came from eating a producer that captured the sun's energy.


Q: Which is the ultimate energy source in a bear's food chain?

 Choices:

- decomposers

- plants

- heat

- sun

A:
sun
