Write any three direct source of information about the earth interior​

The knowledge about interior of the earth is obtained through direct sources and indirect sources. Direct sources include rock materials from mining areas and molten magma from volcanic eruptions. ... Indirect sources include meteors that at times reach the earth, gravitation, magnetic field, and seismic activity.

B: Tropical

Polar and subarctic are nowhere near the equator, and temperate is a little bit further, so all that's left is tropical.