The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
Kamehameha I's method of placing his chiefs' landholdings in different locations kept those chiefs from rebelling against him for the following reason.
King Kamehameha I was known to be the founder of Hawaii, the Kingdom of Hawaii. He was a great leader that could accomplish something very important in the history of Hawaii. In 1810, he could unite the Islands to form one territory. That was something to be proud of at that time.
Kamehameha I was smart enough to Kamehameha I placed his chiefs' landholdings in different locations to keep those chiefs from rebelling against because being separated it was very difficult for those kings to unite and create alliances that could risk King Kamehameha leadership.
In few words, doing that, the King prevented rebellion against him.