Final answer:
Alfred Lord Tennyson changes the tone in the last stanza to produce a tone change at his disbelief at how brave they were and ends the poem with the message of 'Honour their bravery'.
Step-by-step explanation:
The statement that Alfred Lord Tennyson changes the tone in the last stanza to produce a tone change at his disbelief at how brave they were and ends the poem with the message of 'Honour their bravery' is true.