Which sense is used to determine whether an object is something you might want to eat? smell

sight

taste

all of the above

answer: i'm not sure which is which for i get confused on it all the time but i can tell you that the answer lies with the convex and concave devices. i hope this you. have a good day and best of luck to you!

explanation:

vapour or gas assuming atmospheriv pressure

answer///terminator or twilight zone;

there are no components of a physical goal mentioned on the list of choices that you've provided.