Final answer:
The three types of imagery in the lines are visual imagery, auditory imagery, and olfactory imagery.
Step-by-step explanation:
The three types of imagery in the given lines from "The Lake Isle of Innisfree" are:
a) Visual imagery - e.g., "noon a purple glow"
b) Auditory imagery - e.g., "where the cricket sings"
c) Olfactory imagery - e.g., "peace comes dropping slow"