Where is most rocky material located?

Australia

Explanation:

Some of the oldest and most rocky surface son earth can be found in Canadian Shield, Australia, Africa these are felsic rocks that ages up to 3.8 billion years. The rocks that contain quartz, feldspar, and zircon are considered to be the oldest ones. Canadian shields are home to gneiss rocks which are igneous cores of ancient mountainous rocks being exposed by glacial peneplanation. The oldest rock formation of the Indian peninsula is found in the Deccan peninsular of the south Indian and dharwar system of mountains. These have been found 500 million years ago, located in Karnataka and Aravallis located in Rajasthan.

Answer (a) the itcz comes overhead for part of the year; i believe this is correct,plz check first; ///

The answer is d., a mountain.