What part of a scientific research report is most likely to explain the report's key findings? the abstract

the methods section

the list of sources

ABSTRACT. An abstract contains brief statements of the purpose, methods, results, and conclusions of a study.

Show his work so he doesn’t get points taken off. this is because even if he can do calculations in his head, he may make a mistake and having it on the paper will not only him find mistakes but show that he was doing the work as well.