Step 1: Understanding the Concept:
The question asks for the specific term that describes the conversion of waste into new, usable materials.
Step 2: Detailed Explanation:
(C) Recycling: This is the exact definition of the process. Recycling involves collecting and processing materials that would otherwise be thrown away as trash and turning them into new products. For example, recycling old newspapers to make new paper products or melting plastic bottles to create new plastic goods.
The other options are incorrect:
(A) Design: The process of planning the look and function of something.
(B) Pattern: A template or model used to create something.
(D) Knitting: A method of making fabric by interlocking loops of yarn.
Step 3: Final Answer:
The process of converting waste materials into new products is called recycling.