Reducing resource use by collecting usable waste materials and using them to produce new items is known as recycling conservation source reduction reducing

Recycling
Because your using the same stuff to make it new again.

Hello. I have read over the question a few times and have come to the conclusion that your answer is:A. When you recycle things they will be used to make new things.
I hope this will come to help with your learning experience. Have a Wonderful Day! :)

Idon't know how to do this but maybe ask your mom or dad