Unit7 list 4

4. made of a lot of different but connected parts, or difficult to understand
6. a settlement of differences by mutual concessions
7. features belonging to the culture of a particular society, such as traditions, languages, or buildings, that were created in the past and still have
8. the way in which the parts of a system or object are arranged or organized, or a system arranged
9. the action of someone or something changing and becoming better
13. downloude app
14. Mixed with water and dirt
15. panels Solar panels absorb sunlight as a source of energy to generate electricity or heat.
16. able to resist wear, decay
17. A brick is building material used to make walls

1. to keep alive or in existence
2. is the process of constructing a building or infrastructure.
3. is a color
5. housing that is not too expensive for people of limited means
10. a building or place that is easy to recognize, especially one that helps you recognize where you are
11. Efficiency is the ability to avoid wasting materials, energy,
12. Straw is an agricultural by-product, the dry stalks of cereal plants