You are presented with the question "the Himalayas were formed from older what" and the following answer choices: 
- soils
 - plates
 - rivers
 - rock
 - eras
 - meadows
 - dirt
 - plains

Now knowing that the Himalayas were formed by rock folding and movements in the earth's crust have folded and cracked the older rocks, choose the best answer.


 

    rock     