Greece is a very mountainous area, so there wasn't much flat land to crop crops like white and barley that would feed the large herds of animals, so they farmed things like grapes and olives instead.
They both eat natural and living organisms (herbivore = plant eater) (carnivore = meat eater) and they are both types of eaters/animals. However herbivores and carnivores are more dissimilar than alike.
Yo tengo mucho dinero.
Yo no tengo suficiente dinero.
A because we are all doing it as a society.