Please help ASAP! Which part of the sonata form introduces the musical themes? O Development O Exposition O Recapitulation

After reading and listening to the examples in the first few chapters, you have hopefully gained a little better understanding of pitch, range, and tone with instruments and voices. describe the many varieties of musical sounds possible from the human voice. be sure to consider issues such as range, social function, historical period, and regional styles when constructing your answer.