Which of the following support the argument that light behaves like a particle?

a. sound, which travels in waves, can't travel through a vacuum.
b. interference is observed with light.
c. diffraction is observed with light.
d. unlike sound, light waves don't need a medium to self-propagate

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.