Answer:
The two requirements for something to be matter are
1. Mass
2. Volume
Biological soil crusts<span> are communities of living organisms on the </span>soil<span> surface in arid and semi-arid ecosystems. They are found throughout the world with varying species composition and cover depending on topography, </span>soil<span> characteristics, climate, plant community, microhabitats, and disturbance regimes.</span>
I believe proteins would be the correct answer, but of course I just learnt this stuff 2 weeks ago. xD
1100
the elevation of point z is 1100 because in the picture...