Answer Explanation:
Justification: The text describes the newspaper furniture as "light, but it is also very strong. It looks colourful and it's good for the environment too!". While it doesn't explicitly state it protects the environment, being made from recycled materials is a form of environmental protection. Option 'a' is contradicted by 'very strong', and 'b' is contradicted by 'colourful'.
Answer: c protects the environment.