Here's why:
* Paragraphs are about ideas: The number of sentences in a paragraph depends on the idea being conveyed.
* Varying lengths: Paragraphs can be short (a few sentences) or long (many sentences).
* Focus and unity: The most important factor is that all sentences in a paragraph relate to a single main idea.
So, a paragraph can have 2, 3, 4, 5, or more sentences, as long as they work together to develop a clear and cohesive thought.