The central idea of this excerpt is that Utopians make a regular effort to care for those in need.
Which detail best supports this central idea?
A council is held every year in Amaurot.
Three people from each town are sent to the council.
The council examines the surrounding towns.
Towns with an abundance provide for those with less.

Towns with an abundance provide for those with less.

Explanation:

In the great council at Amaurot, to which there are three sent from every town once a year, they examine what towns that are rich and those who do not have enough so that the rich towns can help those with less. This is done freely by the towns without no any form of payment either now or in the later future. According to the abundance or scarcity at any of the towns, they supply or are supplied from one another, so that indeed the whole island is, as it were, one family.

it u understand what he thought at the time and let u know more about him then what third person would of known probably. hope this : )