Using complete sentences, compare and contrast the characteristics of a metropolis and a megacity. do not answer if you don't know it

A metropolis is one city with a population of half a million or more residents that sits at the core of an “agglomeration” of smaller urban entities that merge into a continuous built up area. A mega city is a very large city, typically one with a population of over ten million people. Some differences can be a mega city holds more people than a metropolis, and is a very large city, not just made up of different small urban areas. Some similarities is they're both meant for large groups of people.