From the end of paragraph 3 ("And how ... like it") to the beginning of paragraph 4 ("The swing ... a toe"), the narrator shifts from describing the swing as

i think one answer could be this poet uses no rhyme.

the sentence does not violate the phrase structure second rule (introduced by noam chomsky) because noun phrases consist of a determiner such as a, the or every, and a noun. in the sentence, the noun phrase the cake includes a determiner (the) and a noun (cake).

on the other hand, the first rule indicates that a sentence encloses a noun phrase, followed by a verb phrase. the example sentence can be analysed as follows:

john (n) + ate (v) + the (det) + cake (n).

is it "means of nourishment"