Autotrophs make their own food using energy from

Autotrophs make their own food using energy from photosynthesis.

The autotrophs use energy from the sun to convert water from the soil and carbon dioxide from the air into glucose.

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.