Most flooding in india is caused by monsoons that
the lushootseed people lived for milenia, where olympia was then located. this because of how good this area was for fishing.
when the new-comers arrived, the great fishing was also one of the atractives they saw in this area. another thing that attracted them was the possiblity to eventually use the tumwater falls as a source of energy (water-power)
but the main reason why this area was chosen was the great location it had, north to important trade routes. it allowed for great water access movility on a regional level all across puget sound and beyond. it is important to mention the importance water transportation had in those times since it was easier.
"they found water access to puget sound" this is the corect answer
they wrote their constitution.