Ruby is writing an argument about icebergs. Read her claim and reason, and then answer the question. CLAIM: By studying icebergs, biologists gain valuable information about many other parts of the natural world. REASON: Studying icebergs helps biologists to learn about life in the ocean. Which of the following sentences should she use as evidence to prove the reason is true

1) if the main idea is to show the sequence of events, a cause-and-effect style of writing will be used.  2) if the main idea is to show why one product or idea is better than another, the basic points of each side will be compared and contrasted.  3) if the main idea is to present opposing viewpoints, the pros and cons of each side will be discussed.  4) if the main idea is to draw special attention to an important cause or event, various examples will be provided.  5) if the main idea is to define a certain term or concept, various examples and explanations will be provided.