THE PARAGRAPH

A paragraph can be described as a group of related sentences that develop a unit of thought within an essay. It is set off by the concept of indentation in the first line. Subsequent lines begin with a margin. A paragraph might contain a topic sentence, while quite often the introduction paragraph may contain thesis statement.         The topic sentence States the main ideas in a paragraph.
It may occur at the beginning, middle or end of the paragraph. It often comes with associated phrases and sentences to form the paragraph.

Topic sentence in medial position
   Ref example ("DUST")

Recently, I was expecting a visit from friends who had never been to my house. So I decided to clean at least the surface of all the rooms they'd see. As I moved from room to room surveying the job I was amazed at the amount of dust every where I looked. Under the beds and surfaces I found huge dust balls. My rarely used dining room table was covered with a fine gray film that I could write in. Some of my window sills were coated with a darker, grittier substance. By the time I started upstairs, I was noticing dust in the heating grate, dust on mouldings, and even dust cycling to old spider webs.
     The topic sentence above is italicized. It is medially located.

Topic sentence at the terminal position
Ref example, Enugu: a fascinating city

    It is easy to remember when one is driving into the coal city through the famous mines. The first flyover announces the entry as one joins the fast-moving human and vehicular traffic into the centre of the town. People can be seen from all sides of the road, flashing smiles and exchanging greetings. The bustling and jostling continue all through the day under the blazing sun. At dawn,the blazing sun is replaced by the warm gentle breeze from the hills.
Enugu is indeed a fascinating city.

Here the last sentence is the topic sentence