There are lots of different kinds of bacteria. Bacteria are very tough and can live just about anywhere. Some bacteria can make you sick, but many others are good. Bacteria were among the very first life forms on Earth. A fungus often looks like a very tiny plant, but these things called fungi are more closely related to animals.
Many fungi get their food from soil, and others eat dead plants and animals.
A mushroom from the food market is a fungus you can eat. Other good fungi include yeast that is used to make bread.