Answer:
A). The tree is meant to symbolize the friendly unity of the tribes.
Step-by-step explanation:
The excerpt from the Iroquois Constitution primarily conveys the idea of 'unity and integrity of the Iroquois' community. The 'Tree of Peace' has been employed as symbol to represent this idea. This inference can best be supported through the descriptions 'spread the soft white feathery down of the globe thistle' as the tree will function to disseminate the peace among the branches of five nations. This will nurture the 'long leaves' and nourish the peace among them. Thus, option A is the correct answer.