1.  Humankind can feel happiness and endure hard environment , and so can animals.

2.  Second, large amounts studies also prove that viewpoint that animals can think.

3.  First, animals can always behavior actively and cleverly.

4.  As far as I am concerned, I hold the view firmly that animals can and must be able to think in the way as us human beings do.

5.  Donald Griffin of Rockefeller University argues that we shouldn't neglect animal awareness and thinking for that animals can adapt to their environment and have communications.

6.  The difference between the people and animals is that people can think but animals can't.

7.  For instance, why animals are different in their behaviors and why animals can adapt to the environment.