Read the descriptions below.

My Town

There are many public places in my town.

There is a zoo.
The zoo collects some animals.
There are lions, girrafes, crocodilles, etc.

There is a bookstore.
The bookstore sells many kinds of books.
There are fictions, children books, education books, etc.

There is a hospital.
The hospital treats sick people.
There are doctors, patients, drugstore, etc. 

Answer the question.

What is the function of a zoo?