The answer please?

What is the main effect produced by the repeated word pattern in the first two stanzas of the poem "your laughter"?

Which revision fixes the dangling modifier in this sentence? while reading a new mystery book, my dog curled up in my lap and slept. a.) curled up in my lap, my dog slept while reading a new mystery book. b.) while i was reading a new mystery book, my dog curled up in my lap and slept. c.) my dog, while reading a new mystery book, curled up in my lap and slept. d.) curling up in my lap while reading a new mystery book, my dog slept.

How would you write "the fourth of july? " the 4th of july or the fourth of july? are they both grammatically correct?