Question

4 - How did they
come to know that the olives were
fresh
or
not?​

Answer 1

$\huge\mathcal\red{Answer}$

The olives will begin to have an odor if they are going bad. Their texture and color may also change and they may develop mold if spoiled. If the top of the lid on the jar or can is rounded and dome shaped instead of flat across, the olives have most likely gone bad probably because the jar/can was not sealed properly