The topic of the paragraph.
Topic sentence
a topic sentence
if a paragraph does not have a topic sentence then
Implied Main Ideas sometimes,there is no topic sentence in a paragraph. this does not mean,that there is no main idea. (implied) (:-)
The sentence that states the main idea of the paragraph is called the 'Topic Sentence'.
Topic Sentence
The sentence that introduces the paragraph's main ideaa sentence that introduces the subject of the paragraph.
If you mean what sentence in the paragraph contains the main idea then it would be the topic sentence and the rephrased version of the conclusion.
The topic sentence summarizes the main idea of a paragraph and supports the thesis.
It is the first sentence of a paragraph which is the topic sentence.
Topic sentence
The key sentence, or thesis sentence, is the sentence that states the main idea of either the essay or the paragraph. It is the key sentence because other sentences refer back to and support the key sentence.