Which sentence contains an infinitive?

Help pls

Explain what effect the repetition of the lines brennan on the moor, brennan on the moor, bold and undaunted stood young brennan on the has on the meaning of the poem. use at two details from the text to support your answer. use the raqeqec format and write down the line number for your quote

Ineed . the story about rod slappy.

Which tone best fits a business letter