Answer:
The correct answer would be, That makes walking a simple activity for those new to exercise.
Explanation:
In the given paragraph, the importance and advantages of walking are stated. This paragraph states that walking is the best exercise for people who just began their fitness journey. It is the most simple exercise that every person can do just with the help of one good sneakers. There is no need to have cables or stylish outfits or weights to do the walking. Waling is the most appropriate exercise for beginners and then they can gradually increase the weights with their walk or can do different variations with the exercise after getting used to it. So the central idea of the paragraph is that walking is a simple activity for those new to exercise.