Which style of music imitates speech using pitch fluctuations, rhythms, and so on?
a)aria
b)recitative
c)oratorio
d)arioso

The best answer is "B"

recitative

Explanation:

Aria: an aria is a self-contained piece for one voice, with or without instrumental or orchestral accompaniment, normally part of a larger work.

recitative: imitates speech using pitch fluctuations, rhythms.

Oratorio: An oratorio is a musical piece that is usually lengthy and based on some Biblical or religious event.

Arioso: arioso is a category of solo vocal piece, usually occurring in an opera or oratorio, falling somewhere between recitative and aria in style.

a)scientists

explanation:

the national defense education act had two main goals. the first one was to provide personal that was oriented to defense, including scholars, engineering students and so on. the other goal was to provide financial assistance for the students who would be enrolling at colleges and universities in the 1960s.