What is the best definition for the concept of recycling?

Question

1.to not do things that would harm the environment
2.to turn materials into new, raw materials for other products
3.to minimize the amount of resources that you use
4.to use again anything that you can, rather than throwing it away or using disposable items
5.to use disposable materials as much as possible

Answer 1

4.to use again anything that you can, rather than throwing it away or using disposable items