I'm gonna say Parliament, at least historically. Monarchies are typically replaced with Parliaments, which work as more democratic governments.
The ideas about government that early American
leaders could have learned from the Iroquois Confederation are having a
constitution and leaders that will work together to solve problems.
To add, The Iroquois are a historically powerful northeast Native American<span> confederacy
and they were known during the colonial years to the </span>French<span> as the "Iroquois League," </span>
<span>Assuming that this is referring to the same list of options that was posted before with this question, the best option is "exercise" since it can clear the mind. </span>