Question

Which line from Utopia is an example of an analogy?

They supply or are supplied from one another, so that indeed the whole island is, as it were, one family.
They eat and drink out of vessels of earth or glass, which make an agreeable appearance, though formed of brittle materials . . .
They polish them, and with them they adorn their children, who are delighted with them . . .
They wonder much to hear that gold, which in itself is so useless a thing, should be everywhere so much esteemed . . .

Answer 1

"They supply or are supplied from one another, so that indeed the whole island is, as it were, one family."

Explanation: this line explicitly compares the island's social/economic interdependence to a family — a direct analogy (simile) using "as it were" to signal the comparison.