what do pneumatic tools run on?\nmanual pumping action\ncompressed air\nfluid pressure\nvaporized gas

Answer

Brief Explanations:

Pneumatic tools operate using compressed air. Compressed - air systems store and transport air under pressure to power the tools. Manual pumping action is not the main power source for pneumatic tools. Fluid pressure is for hydraulic systems, not pneumatic ones. Vaporized gas is not what pneumatic tools run on.

Answer:

B. compressed air