Answer the following question given this paragraph: 

Most natural gas comes from the wells that produce petroleum. An increasing amount comes from a new method. Hydraulic fracturing, called fracking , is very much in the news lately. Fracking makes it easier and quicker to get natural gas from the rock ( Figure below ).


Q: Where does most natural gas come from?

 Choices:

- recycled cooking oil

- oceans

- alchemy

- wells that produce petroleum

A:
wells that produce petroleum
