Answer:
A
Explanation:
estuary is the tidal mouth of a large river, where the tide meets the stream.
Answer:
b. Antarctica's ice
Explanation:
Earth is flatter at the South Pole than the North Pole because of the weight of the Antarctica's ice.
The Antarctica ice cap is the largest single mass of ice on earth. It covers almost 14 million square kilometers and it weighs 26,500,000 Gigatons.
As a result of this heavy weight, it compresses the South Pole of the earth causing the earth to be flatter at the South Pole.
This gives the Earth its slight pear shape.
The rigid portion of earth composed of the crust and the uppermost part of the mantle is the lithosphere.
The solid and outer part of the Earth is referred to as lithosphere. The lithosphere constitutes the brittle upper portion of the mantle and the crust which is the outermost layer amongst all the layers of Earth’s structure. The lithosphere can be further divided into two categories. One is the oceanic lithosphere and the other is continental lithosphere.
Oceanic lithosphere is associated with oceanic crust. They are found in the ocean basins. Continental lithosphere is associated with the continental crust.
Learn more about lithosphere here
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