Which lines of poetry are the best examples of alliteration Is the answer Nathan was a man of his word and a man who came through?

No, the line "Nathan was a man of his word and a man who came through" does not contain alliteration. Alliteration occurs when there is a repetition of the same sound at the beginning of adjacent or closely connected words. Here are a few examples of lines that demonstrate alliteration:

1. "Peter Piper picked a peck of pickled peppers."
2. "She sells seashells by the seashore."
3. "Sally sells sea shells down by the seashore."

In these examples, the repeated sounds at the beginning of the words create alliteration.