When people use a common resource such as water, some will act in a way to maximize it their own benefit ("if i don't use it, someone else will") and the resource becomes overused or damaged. this is known as .

Overexploitation of resources.

Explanation:

In this case it's overexploitation of natural resources, wich is a big problem nowadays. Using resources excessively results in damaged resources, that's called overexploitation.

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