Answer:
The Mackenzie River flows into Beaufort Sea and Arctic Ocean.
I think it’s B,C,A sorry if it’s wrong
This Should Help a Little:
A largely semi-arid belt of barren, sandy and rock-strewn land, the Sahel marks the physical and cultural transition between the continent's more fertile tropical regions to the south and its desert in the north. ... The Sahel also suffers from ethno-religious tensions, political instability, poverty and natural disasters.
1 is physical. Physical weathering is caused by the effects of changing temperature on rocks, causing the rock to break apart. The process is sometimes assisted by water. There are two main types which are freeze thawing and exfoliation. Physical weathering usually occurs in places where there is little soil and few plants growing like mountains, hot deserts, or tundras(the cold tundras).
