The tree is being simbolized in the Iroquois Constitution, since the Iroquois Confederation is symbolized by an Eastern white pine tree known as the Peace Tree, which is a symbol of union between the tribes.
The tree is a symbolism since the Iroquois Constitution was not agreed under a white pine, but in political meetings between its members. The tree is only a symbolic element that represents the union of these peoples.
A person's beliefs and general outlook which act like filter on the information they receive are called perspective.
Perspective is the way you see things and whatever you believe in you would really stick unto it since your mind is already set for it. It's disregarding things other than your own thinking.
The answer is more. "More forceful" compares the water spirit to the other creatures of land and sea.
The child was staying with them because he was too little and they had to help him grow and get stronger if not they would have gotten rid of him.