The answer is (2) insert a comma after me
Cob has been used since the 17th century as a building material. It is made by mixing dry sand, sifted clay and water. A cob house is a house that is made from this material. A benefit of using this material, is that it is sustainable and only uses natural products.
Answer: It is a passive voice
Explanation:
History has taught our community that solutions occur only after a long thought.
It should be Who took out Chandler's garbage cans