Optimism among the incumbent’s supporters high despite a recent drop in candidate polls. a) remain
b) remains

b) remains

Explanation:

"Remains" is the grammatically correct word to occupy the white space shown in the question above.

That's because that word is related to the word "Optimism", which represents the pronoun "it" in that sentence. As we know, when using the pronouns "he, she, it" we must conjugate the verbs. The correct form of "remain" is "remains".

i do believe that the correct answer is   (technical reasoning); luck

explanation:

well, there are a lot of places we get information about earth from. like science classes, websites, books, newspapers, etc.