What is the purpose of the third paragraph of this article

Why are reading and writing necessary in today’s world?

What is the meaning of the word "caches" as it is used in paragraph 6

Which statements are true of an allegory? check all that apply. it is an extended metaphor. it has literal and symbolic meanings. it to communicate an abstract concept. it is an exact representation of actual events. it uses objects to represent a single characteristic. it has moral, social, religious, or political significance.