Hello. You didn't show which words are underlined, so I'll give you the grammatical name and function of all of them.
What: Pronoun. It has the function of referring to or replacing a noun, representing something, which does not have a specific name, but which needs to be represented in the sentence. The pronoun is a variable word.
To do: Verb. It has the function of representing an action, an activity that will be performed by something or someone.
Is: Verb. It has the ability to represent a state or occurrence.
Problem: Noun. It has the function of naming something or someone.
Answer:
Here u go.... Answer is ready hope it helps u have a great day ahead....
A would be the sentence with a confusing antecedent, because the "he" could have been referring to "Uncle Arthur" or "Benjamin."
Answer:
It helps them understand how The Mercury Theatre was privately funded but was founded on the same principles as those that guided Welles' Federal Theater Project productions a few years earlier.
Explanation: