A "pig" is the animal, "pork" is the meat. This actually goes back to the mixing of French and Anglo-Saxon words during the Norman Conquest of England. At that time, English acquired a lot of words from Latin-derived French words. "Pig" is derived from Anglo-Saxon, "Pork" from French and Latin. There are a number of other such pairs. "Ox" and "steer" and "cow," the animals, are Anglo-Saxon; "beef," the meat of these animals, is from French.

A pig is a live animal. Pork is cooked pig that you eat.

Pork is meat that is processed, while a pig is an animal that is still alive. :)

Pig is the animal pork is food/culinary name meat for pig

pig plays in the mud, pork comes on a plate cooked yummy