What can the reader infer about emus wing

Amplitude is: a. the number of waves in a certain amount of time. b. the distance between the top or bottom of a wave and the center of the wave. c. the noise floor acceptable in recording. d. the distance between two identical points on a wave.

Which pair of words best describes dada art? a. emotional and colorful b. dynamic and joyous c. realistic and dreamlike d. political and controversial

What types of visual art mediums are heavily based on observation?