Final answer:
The density in the Earth's crust increases with depth.
Step-by-step explanation:
The density in the Earth's crust increases with depth.
The mantle, which is located beneath the Earth's crust, has a density that increases from about 3.5 g/cm³ near the crust to more than 5 g/cm³ at greater depths. This increase in density is due to the compression produced by the weight of the overlying materials.
Therefore, the correct answer is option 2) increases with.