which of the following is an example of a biotic living factor that could be limiting for populations​

Biotic or biological limiting factors are things like food, availability of mates, disease, and predators. 

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.