Answer the following question given this paragraph: 

Producers are organisms that produce food for themselves and other organisms. They use energy and simple inorganic molecules to make organic compounds. The stability of producers is vital to ecosystems because all organisms need organic molecules. Producers are also called autotrophs . There are two basic types of autotrophs: photoautotrophs and chemoautotrophs.


Q: Photoautotrophs and chemoautotrophs are two basic types of what?

 Choices:

- plants

- consumers

- decomposers

- autotrophs

A:
autotrophs
