What does bold usually suggest?

How does dr. king defend the claim he makes in paragraph 9

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.

What piece of evidence does not provide good support for this claim?