According to sociologist robin williams, the core value of pushes americans to want things to be bigger, better, and faster. a. efficiency and practicality b. cooperation and pacifism c. achievement and success d. progress and material comfort

d. progress and material comfort

Explanation:

People strive to become successful and be more outstanding than others.

As for progress, people from US expect that everything should always get better as times passes.

Connected somehow with material comfort in which American society expect to have a high, comfortable and non problematic way of living. Having basic needs like food and shelter, and easy to achieve way of living is something every American (according to sociologist Robin Williams) aims for.

those sounds of the natural world are bioacoustics, and they're more than a false-color spectrogram of data from the musiamunat conservation area.

your answer would b. the missisipi river

hope i you : )