Question

http://prntscr.com/h7eour

Answer 1

:O i was thinking the same

Answer 2

I would say Wind or Water. Water seems more likely.

Answer 3

I say 100% water. That's how the grand canyon was formed.

Answer 4

Yep.

Answer 5

But it can also be wind. More water though.

Answer 6

Answer is water because fast water erodes more quickly than slower water and water is just the best liquid in the world

Answer 7

@JustSaiyan 100% agreement on aqua