Parts of speech are traditional classes of words (such as a

Parts of speech are traditional classes of words (such as adjectives, adverbs, etc.) that are distinguished according to the kind of idea denoted and the function performed in a sentence.
On the basis of this definition, it is correct to say that the words “almost” (last sentence of the second paragraph), “favor” (third sentence of the fourth paragraph), “which” (first sentence of the last paragraph) and “between” (third sentence of the last paragraph), which were taken from text 4A1-II, are, respectively,