Question

Physical systems are important because they



describe the flows of energy and the cycling of matter through the earth



only involve non-living things on earth



never result in the cycling of nutrients



have not been interfered with by human beings

I know this isn't history but there's no one in geography helping :(

Answer 1

I could have went there XD

Answer 2

Well do you wanna go there after this question? xD

Answer 3

Sure! ^.^ Though your going to have to tag me. xD

Answer 4

Here: http://www.eoearth.org/view/article/150616/

Answer 5

That's fine cx

Answer 6

would this be c?

Answer 7

Or no A?

Answer 8

A! \(\color{blue}{BINGO!}\)

Answer 9

Yes!:D

Answer 10

So smart XD