I answered two of your questions. Now it's your turn.
What do you think?
i think they study settlement patterns because they want to improve settlement for the future?? im not really sure why.
Yes, you're on the right track. :-)
Geographers learn from settlement patterns the effects of human relationships with their environment. What resources are used? How can a culture preserve these resources? Why did people settle one place and not another? Why were some settlements abandoned? How can we prevent other abandoned settlements?