The call-and-response concept in blues music was different because:

Both the call and the response could be given by the soloist.

Explanation:

A call-and-response is a succession of two phrases in different parts of the music. This is a common feature of many genres of music, but is particularly common in African and African-influenced music. This element was common in blues music. However, in this case, both the call and the response could be given by the soloist.

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yes peace and development are complementary to each other since they both undergo a great deal of getting where they want to go whether its peace in general and. development