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
Answer:
I would go with A. Salinity and Temperature
Answer:
The domestication of animals helped contribute to the development of permanent settlements because some animals could help locate were there is food.
The animals need food in order to survive and so do humans, so wherever the animals went to eat they saw that they could eat the similar things.
Explanation:
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He was a part of the Romanov dynasty.
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Differences in temperature and in density of seawater drive deep ocean currents.
