Explain how human activities can intensify, or even cause a landslide.

Human activities can intensify or even cause a landslide by trees and other vegetation anchor soil in place and prevent rain and floodwaters from eroding too much of it. When humans clear this vegetation away, for the timber or development, this leaves the exposed ground in greater danger of landslides.

Explanation:

a physical change is being made.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.