energy sources formed over millions of years from the remains ...

[ Vocabulary ]

energy sources formed over millions of years from the remains of dead organisms

A. energy conservation

B. fossil fuels

C. renewable resources

D. human impact

E. sustainability

Select your answer:
A B C D E

Other quiz:

Tenses › View

________ my neighbors were having a picnic, the rain started to pour down

A. when

B. while

C. during

D. before

Grammar › View

The poor helpless orphans _______________ away by the strong tidal waves.

A. sweep

B. were sweep

C. were swept

D. was swept