What is food? Md. Saifur Rahman Any nutritious substance that people or animals eat or drink or that plants absorb in order to maintain life and growth.You may likeDo I need car insurance?What is car insurance?How could I get cheaper car insurance?What is auto insurance?Why Adulterant food is the barrier to sound health?What are the producers?What are food preservatives?What is food chain?What is tertiary consumer?