Meteoroid is the term used to describe a solid particle that

this is a good question! i'll do some research and come back when i have the answer!

i think the answer would be b

their crystal patterns have been disrupted by stress

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.