3)_________ CAN OCCUR BETWEEN TWO INSTRUMENTS AND CAN TAKE PLACE AT ANY TIME.

4)A ___________ IS A REPEATED PHRASE.

4. coda is a repeated phrase,

There is not enough information in #3 to help you. I would need to know the context.

I think it might be harmony but there isnt enough information for me to be sure.

Call and response

To determine the correct answer for #3, it would be helpful to have more context. However, "call and response" is a possible answer based on the given information. Call and response is a musical technique where one instrument or voice (the "call") presents a musical phrase, and another instrument or voice (the "response") provides a contrasting or complementary phrase in reply. This interaction can occur between two instruments and can take place at any time within a musical piece.