What are the functions of free falling?

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

Why don't you see your reflection in water with waves or repples