The antecedent would be their. Our doesn't fit because it refers to the whole group. My just doesn't fit at all and neither does his. So it would be Their. :)
Answer:
I hope this helps, the first plays were performed in the Theatre of Dionysus, built in the shadow of the Acropolis in Athens at the beginning of the 5th century, but theatres proved to be so popular they soon spread all over Greece. Drama was classified according to three different types or genres: comedy, tragedy and satyr plays.
It means when you're copying another source/website.
Hope this helps you!!! :)
But the essay is supposed to be about you? how do we know your family background? education aspirations, and career goals? i’m afraid i won’t be able to help