Answer:
Groundwater
Explanation:
Groundwater is the water found underground in the cracks and spaces in soil, sand and rock. It is stored in and moves slowly through geologic formations of soil, sand and rocks called aquifers.
Delivery Person, because a architect takes skill, a nurses aid takes skill, and a brick layer takes skill.
We were the most concerned about the containment of communism (second answer).
The most logical answer is c