What does textual evidence mean

"and descant on mine own deformity: " what does the word descant mean in this shakespeare play richard iii, act i, scene i?

Which excerpt from "perseus" best represents a characteristic of a greek god?

Reat britain justified raising taxes on colonists because of which event? british merchants being denied entry into colony ports colonists picking up arms against british soldiers and merchants american indians receiving more trading from colonists british debt from defending the colonies in the french and indian war