what do the sounds of a radio playing and a cat purring have in common?\na both require a medium to travel…

what do the sounds of a radio playing and a cat purring have in common?\na both require a medium to travel through.\nb both require a human eardrum in order to be heard.\nc both have the same amplitude.\nd both have the same frequency.

what do the sounds of a radio playing and a cat purring have in common?\na both require a medium to travel through.\nb both require a human eardrum in order to be heard.\nc both have the same amplitude.\nd both have the same frequency.

Answer

Answer:

A. Both require a medium to travel through.

Brief Explanation:

Sound waves are mechanical waves and need a medium (like air, water, or solids) to propagate. Whether it's the sound from a radio or a cat purring, this is a fundamental requirement. Options B is incorrect as sound exists even without a human eardrum. Options C and D are wrong because the amplitude and frequency of radio - playing and cat - purring sounds are usually different.