This detail supports the central idea that riches are not important to Utopians, and uses an account of an event to make a larger point. It is best described as a(n) fact. analogy. anecdote. example.

Beheld more Gildan silver in the chain.

Explanation:

After the ambassador had stayed a day among them and saw so vast a quantity of gold in their houses which was as much despised by them as it is was esteemed in others nations.