Which is not a feature of Earth a sun b core c mantle d geyser

A sun is not a feature of Earth.

Explanation:

Earth is a planet in the solar system. As all space bodies it has its won physical features. A sun is not one those features though, as a sun is actually a star, a separate object in space.

As part of Earth features we can roughly divide them into internal and external ones. The internal ones are the one in the inside of our planet, such as its inner core, outer core, mantle, lower mantle, upper mantle. These are all very generalized and huge features.

On the other hand, we have the external features, or rather the ones on the surface. Such features are the hills, mountains, plateaus, valleys, depressions, rift valleys etc. These vary greatly in size, and they can be anywhere from few square km, to hundreds of thousands of square km.