surge

a sudden powerful movement forward or upward

eventually

to state that something will happen at some point

regions

areas

mobile

able to be move or be moved easily

anchored

firmly attached to something else or weighed down so it won't move easily

foundations

the base pieces of houses and buildings that are built on

category

a group of things that are similar to each other in some way

track

to watch something and see where it moves and how it changes