Some of these words have subtle differences. The word "TYPE" differentiates between things that can fall into defined categories. For example, you can have TYPE A blood or TYPE O blood. Each TYPE is specific. The word "KIND" divides things into more general categories. For example, "what KIND of food do you like?" Chinese or Italian? Using the expression "KIND of food" is not as specific because Chinese food can be many different dishes. Italian food could be pasta, risotto or pizza. The word "SPECIES" is used in biology to describe living things that can interbreed. For example, dogs. They are all the same species. The word "VARIETY" is used to describe things in nature with common characteristics. For example, you could ask about varieties of apples. There are so many to enjoy. MacIntosh, Spy, Honey Crisp or Gala. I hope this helps.