Question

brody and ethel are arguing about waves. brody says that waving his hand back and forth is a scientific wave. ethel says that it is not. which statement best describes who is correct?
brody is correct because the wave involves an input of energy.
ethel is correct because energy is not carried from one place to another.
brody is correct because the pattern repeats.
ethel is correct because the motion has no pattern.

Explanation:

A scientific wave must carry energy from one place to another. When Brody waves his hand back and forth, no energy is transferred over a distance (in the sense of a wave - like energy transfer). Just having an input of energy (Brody moving his hand) or a repeating pattern (hand - waving motion) is not sufficient to be a scientific wave. Ethel's reasoning that energy is not carried from one place to another is in line with the definition of a scientific wave.

Answer:

Ethel is correct because energy is not carried from one place to another.