The answer is B. The theory of isostatic equilibrium is used to explain the vertical height of a particular point on the earth such as the Himalayas. This theory is very similar to the principle of buoyancy. The mantle, in this case, is the liquid being displaced by the crust above. To accommodate great pressures such as those exerted by the Himalayas, the mantle distributes the force by height adjustments.
Where are the coordinates?
Answer:
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Human activity has a great impact on waterways. Decreased amounts of vegetation leads to erosion of water banks. Increased fertilizer and nutrients levels in water from agriculture, sewage, and industry lead to the formation of algal blooms and subsequent decrease in other aquatic organisms.