What is the main purpose of the speaker?

Hi. My name is Ralph Mesquite. I am a biologist. I live at Ling Lodge in Brooklyn City. Ling Lodge is on Old River Road. It is a part of Mosquito City. The houses in Brooklyn do not have street numbers. They have names. The name of my building is Ling Lodge and tile name of the building next to my building is Antarctica.
   Ling Lodge is across the road from the Nature Reserve. I often go to the Nature Reserve. I am studying the plants there. In particular I am studying the Mosquito Rose. The Mosquito Rose is a giant red flower. It is an endangered species.
   Sometimes I work at the Nature Reserve and sometimes I work at home and sometimes I drive to my office at the university. Mosquito City has one university. I am a professor at the Mosquito City University. I am a biology professor.
   I was born in Mosquito City and I have lived here most of my life. I am going to tell you a little about the city. Mosquito City is an independent country in the southern Pacific Ocean. The government of Mosquito City is an urban corporation and the city has a population of about three hundred and fifty thousand people.
   Actually the urban corporation of Mosquito City consists of three separate entities. They arc Mosquito City, Mount Sphinx and Brooklyn. As I said before, I live in Brooklyn but the university is in Mosquito City, near the river.