You're asking about the functions of rice, but you need to be more specific! "Functions" can refer to a few different things.

Do you mean:

* Functions in the body: How rice impacts our health and provides nutrition?

* Functions in cooking: How rice is used as an ingredient in various cuisines?

* Functions in society: How rice plays a role in agriculture, economics, and culture?

Please clarify your question so I can give you the most helpful answer!