What are three challenges that a theatre actor might face in their work? what are some strategies that the actor might use to overcome these challenges ?

Since there are no selections, I'm guessing this is a short answer. 

Some challenges: accents, physical restraints, wardrobe malfunctions

How to help with accents: Taking classes and researching the accent
How to help with physical restraints: Exercise/weight gain and physical therapy
How to help with wardrobe malfunctions: In film, they can edit, but in live theatre it is best to improv through the scene until you can fix it

Hope this helps!

Amusical im pretty sure

Ihave no idea what are some of the examples