Give one advantage of natural materials and one advantage of manufactured materials.
Think about your answer, then reveal below.
Model answer: Natural materials are often renewable and biodegradable — wood grows back, cotton decomposes. Manufactured materials can be designed with precise, consistent properties — every batch of plastic can have the exact same strength and flexibility.
Neither type is universally better. Engineers choose based on the project's needs. A biodegradable flower pot might use a natural material. An airplane wing needs the precise, consistent strength of a manufactured aluminum alloy. Many projects use both types — a wooden table with steel screws and a polyurethane finish.