Using your knowledge of Greek roots choose the word that most likely means a round or oval shaped area tiered seating used for viewing games plays other public events?

Here's how we can break down the word using Greek roots to find the answer:

* "Round or oval shaped area" - This suggests the Greek root "kyklos" meaning circle or cycle.

* "Tiered seating" - This suggests the Greek root "theatron" meaning "place for viewing".

Combining these, we get "kyklotheatron". This is a word that is indeed used to describe a round or oval-shaped area with tiered seating, often used for plays and other public events.

While not a common word in everyday English, it's a valid combination of Greek roots that accurately describes the concept.