Identify the word(s) of direct address. i think, dear friends, that the time has come to say goodbye.

"dear friends"

Explanation:

"Direct Address" is a grammatical term in the English language that refers to a speech where the speaker is speaking directly to the listener. That is, the writer speaks directly to the reader. For example, say you are giving a speech to an audience at your school, or that you are writing an opinion article in the school newspaper. When you say "dear friends" or "dear readers" you will be using a grammar term to deliver your message directly to an audience. This grammatical term is the "direct address".

Therefore, we can conclude that the right answer to your question is "dear friends".

not concrete, existing in thought or as an idea but not having a physical or concrete existence

c) problem and solution