What are three good points (along with quotations) as to why the was story realistic through the character of Mark Watney?

Unveiling Realism: Mark Watney's Journey in 'The Martian' Embodies Realism 3 good points, with quotations DOESN'T NEED TO BE SCIENCE RELATED. it can be the way he reacts, how coordinated or a good problem solver he is, etc.