A researchable topic is one in which the writer can find a variety of credible and current sources.
In other words, the writer needs to be able to find a multitude of research performed by qualified individuals to support the overall argument.
Each of these elements plays its respective role to persuade the audience, convince the readers, and convey the meanings an author intends to convey.
For example, an introduction is intended to introduce the topic of the essay.
Its first sentence, which is also called a hook, literally hooks readers.
When readers have gone through the introduction, it is supposed that they have full information about what they are going to read.
A debatable topic is one that has differing viewpoints. Writing about how child abuse has consequences for society is not debatable since no one would disagree with this thesis.
On the other hand, debating whether the common punishments for child abusers are effective or not in deterring crime is debatable and can make for an interesting and well-supported essay.
If a thesis statement has presented three evidences or arguments about the topic, there will be three body paragraphs.
However, if there are more arguments or evidences, there could be more paragraphs. It starts with a topic sentence, followed by further explanation, examples, evidences, and supporting details.