Carbon may be stored in sedimentary rock for millions of years, and carbon is the fuel source. Given these facts, what may be stored in sedimentary rock for millions of years. among the following options:
- Sand castles
 - Chemical energy
 - heat energy
 - Millions of dollars.
 - A fuel source.
 - Energy.
 - In sediment
 - Stored animal fur.


 

     A fuel source.    