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The streamlined shape is given to automobiles to:

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Increase friction

Reduce drag

Reduce gravitational force

Get greater electrostatic force

answer is B.

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Detailed Solution

The streamlined shape is given to automobiles to reduce drag.
The streamlined shape of automobiles penetrates through the air very easily and increases the vehicle's speed. That helps the vehicles to reduce drag and friction.
Air opposes the motion of the objects moving through it, and this resistance by air is called air drag. That is the reason all aeroplanes are provided with special designs so that they can counter air drag. When objects move, the air around them causes friction, known as air resistance or drag, which slows them down. Automobiles, trains, and aeroplanes are all streamlined, with curving and sloping surfaces that cut through the air and reduce drag. That allows them to go swiftly while using less fuel. Boats, like automobiles, can be streamlined to reduce water friction.