Question

how does the title of a modest proposal indicate that swift is writing a satire?
readers know that swift is being serious because he humbly says that his proposal ismodest.
swift does not mean what he says when he calls his proposalmodest or moderate; his proposal is actually extreme.
swift calls his work a proposal, but readers do not know if the proposal will be approved by the irish parliament.

Explanation:

Satire often uses irony. Swift's "modest" proposal is actually extreme, showing irony.

Answer:

Swift does not mean what he says when he calls his proposal "modest" or moderate; his proposal is actually extreme.