Q: What methods allow scientists to add to scientific knowledge and gain a better understanding of the world?


Read this paragraph and choose the correct option from the provided answers:

Investigations are at the heart of science. They are how scientists add to scientific knowledge and gain a better understanding of the world. Scientific investigations produce evidence that helps answer questions. Even if the evidence cannot provide answers, it may still be useful. It may lead to new questions for investigation. As more knowledge is discovered, science advances.

 Choices:

- early investigations

- slow investigations

- close investigations

- through investigations


A:
through investigations