Answer :
Final answer:
Mustard gas was the new weapon that was developed as a result of WWI.
Explanation:
The new weapon that was developed as a result of WWI was mustard gas. Mustard gas was a chemical weapon used by both sides during the war. It was a highly toxic gas that caused severe blistering of the skin, lung damage, and internal injuries. Machine guns and tanks were also new weapons developed during WWI, but mustard gas was specifically developed as a chemical weapon.
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