Question

1. give one example of a sustainable material and explain why it is sustainable.
2. short response: write a paragraph (4 - 6 sentences) explaining why engineers must consider durability, cost - effectiveness, and safety when building something like a bridge or airplane. use evidence from the passage.

Explanation:

For question 9, bamboo is a sustainable material. It grows quickly, often reaching maturity in 3 - 5 years compared to decades for many trees. It requires less water and no pesticides or fertilizers in many cases. It is also biodegradable. For question 10, durability ensures the structure can withstand long - term use and environmental factors like wind and weather. Cost - effectiveness is crucial to make the project feasible within budget constraints. Safety is non - negotiable as it protects the lives of users. Evidence from a passage could include real - life cases of structures failing due to lack of consideration in these areas.

Answer:

1. Bamboo. It grows fast, needs less resources and is biodegradable.
2. Engineers must consider durability to ensure long - term functionality against environmental factors. Cost - effectiveness makes the project financially viable. Safety is essential to protect users. Evidence from the passage could be about structural failures due to neglecting these aspects.