Answer:
an area of exposed rock after a glacier melts away
Explanation:
i took the test
Answer:
D
Explanation:
The answer is D...and if you need explanation you can comment
I suppose you mean to ask why we can't go through obstacles.
Any atom is surrounded by an electronic cloud. When two atoms get close to each other, the electronic clouds repel each other, preventing them from interpenetrating each other. That same phenomenon, on a larger scale, prevents us from going through matter.