In my story, a planet colonizing business goes to a very unlikely part of space to have a good planet in the goldilocks zone. When they out of pure luck, scan a planet almost exactly like earth. They all arrive in 10 aircraft carrier size spacecraft; the 10,000 colonist all awake from cryogenic sleep, all waiting to see their new planet. They travel to the coordinates they got and it is an earth sized moon orbiting a gas giant the size of jupiter; I'm not concerned with any of that bit, reading this link- moon link . They go there and It is an ocean planet, nothing is above sea level. The moon has already has seasons and weather all like earth. The moon has some organisms swimming in the water, none of them sentient.
They either decide to do one of three things:
Make a floating city on the water
Build an underwater colony
Raise a small tectonic plate out of the water
The tectonic plate they are looking at to raise:
About the size of the UK
Has very fertile soil
Plentiful in resources
(They gathered this info from probes they sent to the surface.)
I want to raise a tectonic plate out of the water quickly, the benefits would be:
No worrying about climate control
No worrying about sinking (if permits when rising it up)
More space to build freely
Can make large sustainable farms.
More if you can think of it
How would I raise a tectonic plate out of the water quickly? They plan to raise more plates in the future, if possible.
If it would be better all around and in the long run, just to do another option, tell me why.
BONUS! Think of a good name for the colonist new home.
If more questions, just ask in comments. :)