Answer:
C. The thermal energy of a substance.
Explanation:
Hope it helps.
B. The sand increases friction by increasing roughness.
True
Enzymes help the body in digestion and other bodily functions which involve chemicals.
I don’t know about 3 but I know that 4 is solid, 5 is you’ll feel the vibration first, 6 is you’ll see the lightning first because the speed of light is faster than the speed of sound and 7 is sound waves need a medium to travel and light waves don’t, sound waves are longitudinal and light waves are transverse, and sound waves are mechanical waves while light waves are electromagnetic waves
