The two elements are:
An interesting hook that helps draw the reader in
The essay's main idea
So that the audience isn’t confused on the authors purpose. With a smaller area it leaves not much confusion and allows the reader to know what he/her is reading.
verb - descend a rock face or other near-vertical surface by using a doubled rope coiled around the body and fixed at a higher point.
noun - a descent made by rappelling.
A parental wish is something (usually a task) that a parent would like to be accomplished by the child.