What are the belifs of living in a permanant settlement vs a nomadic settlement? i need 3 belifs

If you mean reasons, then

premanent:

-can amass as much stuf as you want since you wont move

-more time to adapt to environment and settle

-if easier to fortify (security)

nomadic:

-if attacked, easier to get away since you travel anyway

-get great at adapting quiclky to new environment

-adventure, something new, if resources run out, no problem, just move to other resources