What is the main point of the first section of the body, under the heading "explorer" in paraghraghs 2-4

postive, comparative, superlative - good, better, best

recall how we defined nouns as words capable of having plurals and possessive endings. adjectives (and their first cousin, the adverb) also have a feature that distinguishes them. they come in three states. first, the raw adjective—in its positive state—merely describes the noun modified; it doesn’t care about how this particular person or thing stacks up against other members of the same noun class

are you asking for an essay and whats the story?

answer: do

the 'italicized phrase' is a noun clause that is used as a direct object.