The technique of Robert Browning in "my last duchess" is known as a dramatic monologue. This is so because all the poem is expressed in one voice only, as oppossed to a dialogue, where more voices would appear. And it is dramatic because it contains all the elements of drama.
The Portuguese sailors hunted and killed them for meat. Since the birds were flightless and fearless and did not make any attempts to flee, the sailors slaughtered them in large numbers.
The federal government's revenue is an expense of personal budgets.
