No, all living beings do not need same kind of food. As we know that different living organisms have different eating habits according to their structures, requirements, habitats, etc. They may be herbivores (eat only plant products), carnivores (eat other animals) or omnivores (eat both plants and animals). e.g. human being eats bread, rice, fruits and vegetables. Animals such as cow and goat eat grass, oilcake and leaf. Lion and tiger eat other animals.