Answer:
A homeless person is destitute
A light bulb goes off in your head when you have an epiphany
A mistake is something you want to rectify
Step-by-step explanation:
Epiphany is defined as: "a usually sudden manifestation or perception of the essential nature or meaning of something"
Destitute is defined as: "lacking something needed or desirable"
Rectify is defined as: "to set right"
Therefore, the correct answer is
1. Destitute
2. Epiphany
3. Rectify