I think I am happy.

I want to said that my brother\'s son is attends the school..
And about today\'s homework, I think I am happy.
I am oldiest son in my family. And I have only one younger brother.
My family, as you see, are happy.
Just four members of it.
I wonder what your thinking is.

I want to say that my brother\'s son attends the school. (nephew)

And about today\'s homework, I think both external and internal factors are important for me to be happy.

For example, I am the eldest son in my family and I only have one younger brother.

Family and friends can make us happy. While on the other hand, external things like money can also make us happy. People cannot be happy without money to buy their own food. So I think both factors are vital to a person\'s happiness.