His most challenging and unresolved problem was the takeover of the U.S. Embassy in Tehran, Iran in 1978 by Islamic fundamentalists and the taking of more than 40 American hostages. Carter was unable to secure their release during his presidency. The were released once Ronald Reagan took office.
Answer:
Bloom's taxonomy organizes cognitive abilities according to their level of complexity.
The abilities are arranged in the style of a pyramid, and they are, from top to bottom:
Create
Evaluate
Analyze
Apply
Understand
Rembember
An example would be in writing a literary work.
A person would first remember how to write, remember the words as they are learned during life.
Shortly after, a person would understand the meaning of the words, and would apply that understanding to making analysis about how words relate to each other, and how they are used in different literary pieces.
The person could evaluate then, literary pieces made by other authors, seeking a deeper understanding of those works.
And the highest cognitive ability would be actually creating a new literary work, because doing so requires the mastering of all the previous cognitive abilities.