An author may want to use an allusion because An allusion serves as a kind of shorthand, drawing on this outside work to provide greater context or meaning to the situation being written about.
C. asks the benevolent social planner to step in and fix things
<span>It is is known as perceptual constancy. In perceptual constancy you are not able to notice changes in an objects shape, size or direction. In other words, even though an objecting is changing it always looks the same to you even when change is actually occurring because you have gotten so use to your perceived appearance.</span>
They are both very important holy cities in Islam
Mecca is the birthplace of the prophet Muhammad and Kaaba is also located there
Medina is where the early Muslim community developed
I hope this helps:)