To compare the first half (Lines 1-44) and the second half (Lines 45-69) of the poem "Knock Knock," the appropriate response would be:
The first half of the poem addresses the speaker's desire to have his father in his life, while the second half shows that he is able to succeed without him.
Regarding Line 37, "How to walk like a man," this line could be interpreted as an example of metaphor or symbolism. It represents coming of age or establishing one's identity apart from paternal influence. If the question seeks a specific literary device, please let me know if you need additional context or clarification!