Final answer:
Aircraft Carriers were not introduced during WWI, but Tracer Bullets, Depth Charges, Flamethrowers, and Atomic bombs were.
Step-by-step explanation:
Aircraft Carriers were not introduced during WWI. They were a development of naval technology in the mid-20th century. However, Tracer Bullets, Depth Charges, Flamethrowers, and Atomic bombs were all introduced during WWI.
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