Choose the correct one comparing and giving explanation.1. The most/most animals

Choose the correct one comparing and giving explanation.
1. The most/most animals can communicate.
2. Dogs are the most/most intelligent animals.
3. The most/most people like to keep pets at home.
4. The most/most dogs have an easy life in the USA.
5. The Mersedes is the most/most expensive of the three cars.
6. The most/most countries show great interest to our country.
7. The school adminstration awards the most/most diligent students.
8.I think keeping pets is the most/most interesting hobby in most countries.