its called an introduction
Topic sentence
The topic sentence should never be placed in the middle of a paragraph because it is meant to introduce the main idea of the paragraph to the reader. It is best to position the topic sentence at the beginning of the paragraph to provide clarity and guide the reader on what to expect.
at the beginning in the topic sentence
A topic sentence is usually found at the beginning of a paragraph. It provides a brief overview of the main point or idea that will be discussed in the paragraph. This sentence helps to guide the reader and set the tone for the rest of the paragraph.
Final.
The first sentence usually introduces the topic of the paragraph -- in this case, the essay topic as well. The concluding sentence of the topic paragraph is an excellent place to reinforce the essay's topic in the minds of readers.
Topic sentence and controlling idea
It is the first sentence of a paragraph which is the topic sentence.
A paragraph without a topic sentence may lack coherence and clarity. Without a clear topic sentence at the beginning, readers may struggle to understand the main point or focus of the paragraph. It's important to include a topic sentence to provide a clear roadmap for the reader and guide them through the content of the paragraph.
Usually the topic sentence is the first sentence in a paragraph. The topic sentence makes a statement about some topic and the rest of the paragraph explains the topic sentence or gives examples of the topic sentence. For example if this was the topic sentence There are three living species of Kiwi all of which inhabit New Zealand. Then this paragraph would probably tell us what the three species are and where they live in NZ.
if a paragraph does not have a topic sentence then
The first sentence usually introduces the topic of the paragraph -- in this case, the essay topic as well. The concluding sentence of the topic paragraph is an excellent place to reinforce the essay's topic in the minds of readers.