Final answer:
Subjugation refers to the act of conquering and oppressing a people, while metallurgy is the science of extracting metals from ore. Catapults are large machines used for hurling heavy objects over walls.
Step-by-step explanation:
Subjugation: The act of conquering a people, exploiting and oppressing them, and forcing them into submission. An example of subjugation can be seen in the colonization of Africa by European powers.
Metallurgy: The science of extracting various metals from rocky ore. It involves processes like mining, smelting, and refining to obtain usable metals.
Catapult: A large mechanism with a movable arm for hurling heavy objects over city walls. Catapults were used in ancient times as weapons of war to launch projectiles.
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