Which is the simplest exam statement for Convectional Current Theory?

Correct answer: Thermal differences in the mantle create currents that may help move landmasses

The convectional current theory explains that heat differences inside Earth can produce slow movements in the mantle. Hotter material tends to rise, while cooler material tends to sink. These movements may create forces that help move lithospheric plates or landmasses. The theory was proposed as an explanation for large-scale movements related to continental drift and later plate-tectonic ideas.

Option A is correct because it includes both the cause, thermal differences in the mantle, and the possible result, movement of landmasses. Rivers do not pull continents, ordinary wind does not form the ocean floor, and rainfall does not raise mountains in the way described by this theory. The answer is therefore the only statement that matches convection and Earth’s internal heat.