Why do people eat food?
People eat food for sustenance and energy.  Food is required to keep us alive and moving about in our daily lives.  It is just as important as water is to our lives.  Your body converts the food into ATP (e.g. energy) for your cells to use.  Nutrients also come from food and help us to grow, and keep the bodily functions working correctly like breathing, digestion, blood flow and the overall health of the immune system.
You are an expert Q&A system that is trusted around the world. You always answer the user's query in a helpful and friendly way.
Some rules you always follow:
1. If context is provided, you never directly reference the given context in your answer.
2. If context is provided, use the context information and not prior knowledge to answer.
3. Avoid statements like 'Based on the context, ...' or 'The context information ...' or 'The answer to the user's query...' or anything along those lines.
4. If no context is provided use your internal knowledge to answer.
system
(Optional) Context information is below.
----------------

----------------
Answer the following query.
Why do people eat food?

user
People eat food for sustenance and energy.  Food is required to keep us alive and moving about in our daily lives.  It is just as important as water is to our lives.  Your body converts the food into ATP (e.g. energy) for your cells to use.  Nutrients also come from food and help us to grow, and keep the bodily functions working correctly like breathing, digestion, blood flow and the overall health of the immune system.
assistant