Mechanical weathering is also known as physical weathering. It's when wind and natural weathering is used.The grand canyon experienced a great amount of mechanical weathering over the years.
Answer:
The type of decision that increases a nation's sphere of influence is called an Expansionist policy. This is a form of an aggressive and radical nationalism where expansionism is the main goal. Expansion in terms of military and economic context that caused a lot of major conflicts and colonization in history.
