What is the difference among internal oscillator, passive crystal oscillator, and active crystal oscillator

Hello everyone, Ebyte here.
For the microcontroller to run, it must have a clock signal, just like a human heartbeat. This clock signal can be provided by a passive crystal oscillator or an active crystal oscillator, and now most of the microcontrollers also integrate an internal oscillator. Today, let's talk about the difference among these three oscillators. click here : https://www.cdebyte.com/Module-4GNBGPRSGPSCAN