A thing that is or is likely to be wrongly perceived or interpreted by the senses.
A deceptive appearance or impression.
A false idea or belief.
C is the answer your looking for
If someone has their head down or they’re sad, you tell them to keep their chin up so that their crown doesn’t slip. Telling them that they should stay happy or they’re worth it
They discover that the world they know has changed. One member of the party stepped on a butterfly while on the trip, which alters the course of evolutionary history