Answer:
Achilles was the son of Thetis, the Greek goddess of the sea. In order to make her son invulnerable, she takes him to the mythical river Styx, which has the magical power to make any person who takes a dip in the river, invulnerable. To make him the ultimate warrior, Thetis takes baby Achilles to the river Styx; holds him with his left heel and dips him into the water. This heel of Achilles is the only portion of his body which was not wetted by the water at river Styx making it the only vulnerable portion. Achilles is killed during the Trojan war when Prince Paris of Troy shoots a poisoned arrow at Achilles' heel.
Explanation:
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