The Fitness Log is: A.
Fitness information presented in lesson format.
B.
A carefully considered essay response on a specified topic.
C.
A checklist of items to complete each section.
D.
A record of all the physical activity you complete in one week.

D.  A record of all the physical activity you complete in one week.

Explanation:

A "Fitness Log" allows you to keep track of your workout or exercise. Therefore, it is a record of the different workout you've managed to complete within a time frame. It gives you several information such as the type of workout you've completed, its duration and the time of the day it was performed. This makes a person motivated to exercise because he can see his progress. He may also include his mood before and after workout in order to become more mindful in exercising and many other things.

d is the correct answer