Answer:
It looks like children working in a coal mine so i guess Gases, Mines could collapse, and possibly get sick from fumes or something.
Answer:
K - 12 Education is the correct answer.
Explanation:
Answer:
Many historians believe the Indus civilisation collapsed because of changes to the geography and climate of the area. Movements in the Earth's crust (the outside layer) might have caused the Indus river to flood and change its direction.
