What should can i write in this question the answer is down but i want it as a paragraph

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

The radius of a sphere is increasing at a rate of 9 cm/ sec. find the radius of the sphere when the volume and the radius of the sphere are increasing at the same numerical rate.