Answer:
Food Spoilages
1.Bacteria
They are the most abundant microorganisms found on the earth. They are tiny in size and vary in shape. Some bacteria are useful also. They help to convert milk into curd.
2.Protozoa
They are single-celled microorganisms that cause disease like food poisoning etc.
3.Fungi
They are found in damp and warm places and grow on the dead and rotting matter.
Hope it helps >3!