Like, if they remade 13 Going on 30 except it starred bell peppers, young Jenna would be played by a green pepper and older Jenna would be played by a red pepper.
"But why do they taste and smell different?" Because when bell peppers are green, they produce the chemical 2-methoxy-3-isobutylpyrazine (try saying that five times fast), which gives off that ~plant-like smell~.
But as the pepper ripens into yellow, orange, and eventually red, it produces more of the (E)-2-hexenal and (E)-2-hexanol chemicals, which smell and taste sweeter.
Hence, why you've been BAMBOOZLED into believing these delicious liars are different vegetables.
Oh, and P.S.? Green olives are just unripe black olives. (Sorry!!!)