Read the scenarios and decide which type of interaction (absorption or transmission) took place between the wave and the object. People are able to hear footsteps because the sound made by a foot hitting the floor travels through the air to reach their ears. When light from the sun hits the sidewalk, the sidewalk becomes warmer.

transmission and absorption. {Credit To: Kristinepettus}

Explanation:

People are able to hear footsteps because the sound made by a foot hitting the floor travels through the air to reach their ears.  (TRANSMISSION).

When light from the sun hits the sidewalk, the sidewalk becomes warmer.  (ABSORPTION).

b.

developed countries have tended to improve the environment, while developing countries have tended to damage it.