Why do you see objects when you shine a flashlight in a dark room?​

We see objects in a dark room due to the emission of light photons which are sensitive to our eyes. Darkness is simply a terminology used to describe the absence of light. Visible light to human is a component of the electromagnetic spectrum. Our eyes have receptors that picks the photons which light releases

Explanation:

come closer and become far apart and become steam/gas

i believe the answer would be:

d. violin, clarinet, french horn, and tuba