A.I. Explanation:

Option 1: "In Africa, music is usually performed outdoors."

Explanation: While the text mentions that music is usually performed outdoors, this statement only captures a single aspect of African music and does not encompass the broader themes of social participation and oral tradition discussed in the paragraph.

Option 2: "There is no written music or musical notation."

Explanation: This option highlights an important detail from the text, but it is too narrow and does not reflect the overall theme of music as a social activity and its oral transmission, which are key points in the paragraph.

Option 3: "In Africa, music making is spontaneous."

Explanation: This option accurately summarizes a significant aspect of the text, emphasizing the spontaneous nature of music making in Africa. It reflects the idea that music is a communal activity, aligning with the overall theme of social participation and the oral tradition of music.

Option 4: "African music have an interesting characteristic."

Explanation: This option is grammatically incorrect ('have' should be 'has') and is vague. It does not specify what the interesting characteristic is, failing to capture the essence of the paragraph, which discusses multiple characteristics of African music.