Only answer if you know! Review the paper's organization on marathon running, and critique the conclusion by identifying its weakness.

Introduction: Almost all sports, whether indoor or outdoor, require stamina and physical fitness.

Paragraph 1 (thesis):Perhaps the most demanding sport requiring the most heart and lung action is marathon running.

Body: Although many sports provide very strenuous exercise, they do not utilize all the major muscles in the way that marathon running does. . .

Paragraph 2: . . . muscles used in running . . .

Paragraph 3: Although a runner may die from a heart attack, most deaths among runners are caused by incautious running, lack of proper training, or not receiving a thorough physical examination. . .

Paragraph 4: Another important factor in marathon running is the variety of terrain that adds even more challenge to the runner's stamina. . .

Paragraph 5: Most important of all are the statistics of longevity (long life) of marathon runners.

Conclusion: Finally, then, marathon running is the most demanding sport today. It is the best exercise when compared to other exercises. It is an important rehabilitation exercise used in heart, lung, muscular dystrophy, and other types of therapy. Marathon running offers top physical workout, if used properly. It offers its participants a variety of grueling trails, and statistically it increases a participant's longevity. The marathon is the best sport.

Redundant
Introduces
Synthesizes
Elaborates