Paul turns up the volume on his TV. The TV sends an electrical signal to the speakers. The signal changes the sound's

increases its amplitude.

Explanation:

the answer would be c. motion and direction

i hope this : )

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.