With increasing depth, the pressure within earth
a. increases
b. decreases
c. remains constant

The deepest you go, the most pressure you feel.

Explanation:

This is due to an increase in hydrostatic pressure, the force per unit area exerted by a liquid on an object. The deeper you go under the sea, the greater the pressure of the water pushing down on you. For every 33 feet (10.06 meters) you go down, the pressure increases by 14.5 psi.

National Ocean Service.

https://oceanservice.noaa.gov/facts/pressure.html#targetText=This%20is%20due%20to%20an,pressure%20increases%20by%2014.5%20psi%20.

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