Question

what do pneumatic tools run on? fluid pressure compressed air manual pumping action vaporized gas

Explanation:

Pneumatic tools operate using compressed - air power. Compressed air is stored and then released to drive the tool's mechanism. Fluid pressure is more associated with hydraulic systems, manual pumping action is not the primary power source for pneumatic tools, and vaporized gas is not what pneumatic tools run on.

Answer:

B. compressed air