Answer:
The topic, medium, and supporting sentences.
Step-by-step explanation:
The main idea of a paragraph is its point, the most important thought about what it discusses. What you should examine to find the main idea are the topic, medium, and supporting sentences of the paragraph.
The topic sentence of the paragraph is the sentence that summarizes the information in the paragraph. It's usually its first sentence. We can use this sentence to discover the main idea and pay attention to the supporting sentences to find the information that supports it.