Answer:
1.round song
A round in music is a song which can be sung by two or more groups of people. One group starts off and the next group start to sing the same song a bit later. It should sound nice together. When a group gets to the end of the song they start again. They can go round and round, singing it several times.
2.instrumental solo
In music, an instrumental solo piece (from the Italian: solo, meaning alone) is a composition, like an étude, solo sonata, partita, solo suite or impromptus, or an arrangement, written to be played by a single performer. The performer is a soloist.
Explanation:
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