Streams and creeks are examples of
aquifers
watersheds
ground water

Streams and creeks are examples of "watersheds." Aquifers and ground water are related to each other because both of them are located under the earths surface. You have to dig in order to acquire these two. Watersheds are just like catch-basins where waters are stored or being flowed.

Answer (datum point);

Answer sinking and cooled;