The greek word theatron forms the root for our word

Theatre

Explanation:

In English, many of the words that we use come from ancient Greek and Latin words. This legacy can usually be seen in the "roots" of words. A root is a portion of a word from which other words grow when we add prefixes and suffixes. In this example, the word "theatron" is a Greek word that forms the root of the English word "theatre."

i think the answer is b.