What is the correct meaning of the word elective?
Olive chose astronomy as her elective class.
optional
challenging
favorite
final

Option 1. Optional

Explanation:

In this context the word 'elective' means the class that "Olive" got to choose, which means its optional

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martians or other types of aliens represent a unique fear as opposed to zombies. vampires and other types of monsters.   in most sci-fi stories, aliens come from other worlds and have different or more advanced technology.   abductions and experimentation on human bodies that involve these technologies, or the use of these technologies against human beings and the use of unknown "powers", are a type of fear that's different from that of other types of monsters.