________ is a symbolism that continues throughout the literary work.

The correct answer is: Allegory

An allegory is a work that conveys a hidden meaning usually moral, spiritual, or political through the use of symbolic characters and events. The story of 'The Tortoise and The Hare' is a well-known allegory with moral that a slow and steady approach (symbolized by the Tortoise) is better than a hasty and overconfident approach (symbolized by the Hare). Since the characters travel till the end, the allegories will also carried throughout the story. It is because, the characters itself are allegories.