Presents two alternatives or choices; 'or', 'either...or'.
Verb-casual + ?それとも + Verb-casual + ?, い-Adjective + ?それとも + い-Adjective + ?, な-Adjective + だ?それとも + な-Adjective + だ?, Noun + だ?それとも + Noun + だ?
Long explanation:
The ~?それとも~? grammar point is used to present two alternatives or choices in a single sentence. It is similar to 'or' or 'either...or' in English. It can be used with verbs, い-adjectives, な-adjectives, and nouns.