volcanoes hope this helps
Answer:
3.29ft/mi
Explanation:
The gradient of a river is the slope through which a river flows. It measures the vertical drop in elevation of river to the horizontal distance.
Mathematically;
River gradient =
Elevation = 1229ft
Horizontal distance = 373miles
River gradient =
= 3.29ft/mi
When the earth's tectonic plates shift they move against each other causing an earthquake .
It protects us from harmful UV rays from the sun.