Well think of it like this lets say this wasn't and security system and it was a video game console and remote.
Now the console or keypad or the main components the power on or shut off the devices and the remote or sensors are the secondary parts but they are needed to help the console or keypad figure out what they are doing.
<span>The preservation of anything
other than mineral skeletons is (with a few exceptions described below) an
extremely rare event. Anything that can decay is likely to be lost. Fur, skin,
internal organs – all are immensely vulnerable to the destruction by
bacteria, fungi and scavengers that assure their recycling back into the ecosystem. </span>
I don’t know what it’s called but it’s where they can speak by moving there eyes
What do you mean pieces? Like Laptop components? If so then motherboard,ram,cpu, and psu for a basic laptop so 4 I guess (5 if you want to include a gpu).
