Answer:
A variable declaration is a name given to a memory location. It is the basic unit of storage in a program.
The 7 components found in a computer tower are the following:
Power supply unit
Central processing unit
Hard disk drive
Ram modules
Motherboard
Video card
Sound card
Because it ‘computes’ certain tasks, get it. It’s like saying ‘the puncher’ for someone who punches stuff.
Probably the anti virus, so you don't get a virus from downloading the anti spyware program.