Marcia pokes fun at her husband Brian because he loves to sing in the shower every morning, but
his singing is terribly off-key. On the other hand, Brian teases Marcia for talking so loudly when
she's on the telephone. Identify which terms about sounds and sound waves apply to Brian, and
which apply to Marcia.

Since I can see no choices, I answered it in my own understanding.

Brian - amplitude and frequency

Marcia - amplitude and longitudinal wave

Explanation:

"Sound" and "sound waves" are essential part of a person's life. They can be used for communicating and detecting some objects.

Brian loves singing in the shower which means that he is using a greater amplitude. Amplitude refers to the intensity of the sound or the amount of energy that a sound carries. When one sings in the shower, the sound cannot travel very far. It bounces immediately back to the person singing thus, making the sound bigger. Brian is also using a different range of frequency compared to his normal way of talking. The frequency of a normal male voice is normally 85 to 180 Hz. A person singing may have a frequency as high as 1,500 Hz.

Marcia talks loudly on the phone. This means that she is also using a greater amplitude because the intensity of her voice is big. Since she is using the telephone, this means that her voice travels in a longitudinal wave through the telephone. This allows her voice to reach to the person on the other end of the line.

sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid, or solid. In human physiology and psychology.

The sound travels in the following medium:-

Sometimes the sound can be awful to the ears as the frequency of that sound is painful to the ears. There are few sounds that harm the ears.

According to the question, each person is different and sensitive to the different sounds.

Bad singing maybe apply to the brain and the loud tone of the voice may be harmful to the person.

In my opinion, the loud voice applies to the brain more.

For more information, refer to the link:-

link

a. is the answer because they are not shared

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask