Which of these structures is a common way to organize ideas in scientific articles? 1. a list of questions and answers
2. a description of an event, followed by the effects of the event
3. directions for how to make or build something
4. a definition of a concept, followed by examples

4. A definition of a concept followed by examples

A definition of a concept followed by examples

Explanation:

Change 2 to 3 and the last one will be 2

Step-by-step explanation:

I believe a triangular prism will be 1/2 instead of 1/3 because of the side differences between a triangular prism and a Pyramid

Hope this Helped