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.
Because they are not in an area that is in danger of having an earthquake
<span><span>.</span><span>D)<span>marked the beginning of the era known as "Jacksonian Democracy" and the push to settle the western territories.</span></span></span>
I believe the answer is a lobbyist..please check..