The mantle is actually a liquid. The intense heat of the core of the Earth causes the mantle to move in convection currents.
D.) Cultural diffusion
Define<em> diffusion</em><em>:</em>
<em>The process of spread of a feature or trend from one place to another over time.</em>
A C and D. It cannot be b because scientists have warned people in the past about volcanoes and their possibility for erupting. Earthquakes cannot be predicted however there are warning signs one can look for.
