text: what are some natural resources used in european middle ages? give at least 4 natural resources used in the middle ages. will give most points with clear description or most resources listed! coal for heating, wood (various), iron, copper, gold, silver, gemstones, leeches, feathers (quill pens), bones (bone needles, among other things, pete (fertile for growing), willow bark (aspirin), fox glove (digitalis), worm wood (halucinogen & antibiotic), flax, wheat, wool, fish, hay, etc.