To keep these crops stable, they created irrigation and drainage patterns. On the largest of the Hawaiian islands, Hawaii, there are remains of taro irrigation. They also made man-made fish ponds to keep them from continually traveling to the coast. Adaption is how they determined where to grow their crops. Seeing that certain crops grow best under certain conditions, it was necessary for them to find on which island and where on the island to locate their crops.
Expansion is from the permanent settlements that they made which produced an expanding population.
This led to the rise in classes and ranks. The idea of intensification is not definite, however there is some evidence that it is true. This is met when the there is a transformation of social and political relations that structure labor organization and distribution of products. For example, trade among them, and handling of surplus of products. Ancient Hawaiians used the koa tree for canoes, paddles, spears, and much more.