1) the purpose of this piece is to telling you about how you should get a dog because a dog can do so many things for you and about how dogs are the best animals to have as a pet
2) i do agree with the author dogs are the best pet to have in world even though they have there cons they still are very helpful and sweet animals
3) Why dogs are the best
4) the word companion in the second paragraph means someone that you can count on
