I believe that is a trick question, “The degree of metamorphism is a function of pressure, heat and time. During orogenic events, the metamorphism of the rocks can take 100's of thousand to millions of years. Too much heat cannot be applied at once since the rock will melt and recrystallize into an igneous rock” i’ve found those same answers on other websites as well. meaning there really isn’t a right answer.
Answer:
Short Answer: Uplift and Erosion activities
Explanation:
Let's understand this briefly,
Name/Type - Grand Canyon (deep gorge)
Location - Northern Arizona (USA)
Formation - About 6 millions years ago
How - When the river (Colorado) started to cut channels through layers of sedimentary rocks
Formation Process - Weathering and Erosion
Forces which acted - Wind, Precipitation, Streams and snowmelt
Depth - 1830 m
According to question,
It is formed due to tectonic uplift in the region and due to vast erosion activities affected by enormous number of factors.
My guess would be D. Agriculture.
a large waterfall with rapids would be the right answer