Donald is very familiar with the poem that begins "'twas the night before christmas." however, he cannot recall the names of all of santa's reindeer, yet he knows that they are in his memory. donald's difficulty is an example of

the tip-of-the-tongue phenomenon

Explanation:

The tip-of-the-tongue phenomenon is the failure of recalling something from memory. A large part of the memory is recalled but the individual fails to retrieve any word or specific term. People remember some part of the word but fail in recalling the targeted word. At the same time, when a person can recall every piece of memory, he feels relaxed and relieved.

answer; empathy;