Final answer:
Rowley lost his concentration while bench pressing due to Greg's distractions, a scenario from the 'Diary of a Wimpy Kid' book series. Greg's antics are a common source of humor and complications in the series, particularly impacting his friends during school-related activities.
Step-by-step explanation:
The cause of Rowley's loss of concentration while bench pressing was Greg's distractions. It is a detail from the book series 'Diary of a Wimpy Kid' by Jeff Kinney, which focuses on a young boy named Greg Heffley and his adventures and misadventures during his school years. The series is known for its humorous take on the everyday challenges and situations faced by middle school students.
In the context of the series, Greg often finds himself in comical situations or causing them for his friends, such as Rowley. Loss of concentration while performing an activity like bench pressing could be due to various factors like loud music, equipment malfunction, or fear of injury. However, in this case, it is specifically Greg's behavior that distracts Rowley.