Walking is not the most exciting form of exercise a person can take on for fitness. Yet it is low impact and requires no fancy e
quipment. That makes walking a simple activity for those new to exercise. Walking is less likely than other exercises to cause injury to leg tendons and muscles. All it requires is a good pair of sneakers-no cables, stylish outfits, or weights required. Of course, a person could increase the benefit of a workout by adding weights or speed walking. Identify the main idea of this paragraph.
Walking is a difficult and safe exercise for beginners.
Walking is an easy and safe exercise for beginners.
Walking is a boring and dangerous form of exercise.
Walking is an exciting and very effective form of exercise.
You didn't provide the excerpt but if it's the one I found online, I think A would make the most sense as the passage is primairly based around his own actions. If not A, then D would be second choice I think.
Marginal product is the additional output produces when one more unit of labour is employed. In our case, when Elmo hires a second worker, his marginal product is 7.
