Wood is not a pure substance it is a mixture, because it is composed of compounds such as cellulose, hemicelluloses, and lignin which are made up of elements such as carbon, hydrogen, and oxygen.
Hope this helps
I'm not good with this stuff, but I'd try summarizing the paper for your closing paragraph. End with a sentence like, "That's why I love summer vacation" if it's about why you like summer vacation. I hope that makes sense!
Answer:
13. The second option. The source was new a year ago
16. The first option, it would give you the best understanding
Explanation:
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The Meeker family and the rest of their friends in Redding, Connecticut. ... Right off the bat, we learn that the Meeker family has some drama coming their way. Sam has decided to become a soldier in the Continental Army. This means he's going to join the Patriots to fight for the American Colonies to be free from England.