Answer:
1) Anna is a dog and is a beautiful girl.
2) The dog is funny. (It could be either one but this one is more in relation to the first sentence)
3) My mom cooks the pizza (
Explanation:
1) I am assuming that the first two sentences are related and also people don't normally have two descriptors in the same sentence that mean the same thing. Dog is the best option
2) Because we called the dog a beautiful girl in the first sentence I'm guessing we wouldn't also describe her as crazy. Crazy is more used when a dog has a lot of energy and does really weird things.
3) People do not eat rats and people do not cook them