Answer:
Dancing
Explanation:
you don't need a lot of talent to be a teacher. Neither social work. Now running audio equipment takes more practice then talent. So it leads down to dancing.
Answer: i'm not sure about the artist and painting names (just reverse image search it by going to images.google.com) but yes, the artist has used space effectively, by filling the artwork with details and color to highlight the people in the middle.
Explanation: