Question

what are pneumatic tools powered by? select the best option compressed air sand liquid human power if you need to review this content, it can be found in the pneumatics and liquid module of the

Explanation:

Pneumatic tools operate using compressed air. Compressed - air is stored in a tank and then released to power the tool's mechanism. Sand, liquid, and human power are not the power sources for pneumatic tools.

Answer:

A. Compressed Air