The principle stating stating that the oldest rocks occur on the bottom of an undisturbed rock sequence is known as

The principle of Superposition states that, in an undisturbed sequence, the oldest rocks are at the bottom of the sequence and successive layers are younger than those below them. This is different from relative dating because, relative dating examines rock position in aq sequence to determine the order of events the rock's relative age.

The answer is cometm

Iwould say overuse ( but not 100% sure ) in the u.s. we tend to overuse water by leaving it running, throwing it away, taking long showers, etc.