What is a map projection? a. a type of map that shows political boundaries b. a type of map that shows elevation and slope c. a way of displaying the 3-d earth in a 2-d form d. a tool for estimating distances on maps

A "projection" is a way of displaying the 3-D Earth in a 2-D form (C)  ... like on a piece of paper.

There are many different map projections.  Each one has advantages and disadvantages.  It's not possible to correctly reproduce all the details of a globe surface on a flat piece of paper.  Something's gotta give.

the precambrian aged rocks could be found in australia. australia is a region that has a lot of ancient civilization history from million years ago. in this region, there are a lot of recognizable fossils buried in its land which is considered a precambrian-aged rocks