It's B.
As you go up, the air thins out, meaning it is less dense. Since there are less molecules that can transfer heat, the temperature is lower.
Today personal computer is changed to laptop mode. Personal computer is made of CPU, monitor, keyboard, printer and mouse. All input device and output device connected with wire or without wire.
<u>Explanation:</u>
Personal computers are also called as desktop or workstation. These days all become compatible device which is called as laptop.
Basically all input devices and output device are fixed in laptop so end user can carry the laptop and used anywhere.
Laptop is charged and used, whereas desktop or workstation just fixed in the table and used it.
It's often Linux since Linux is free, but it could be Windows.