What is the best definition for a paragraph's topic sentence?

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 equipment. 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.

Why might carl sandburg have placed an emphasis on politeness among the animals in the committee of sixty six and in the interactions the animals have with humans in "how the animals lost their tails and got them back traveling from philadelphia to medicine hat"? a. to show that animals are more polite than humans b. to poke fun at the extreme politeness of the animals c. to teach children how to interact with adults d. to teach children how to interact with animals asap

In the paragraph box, write the main idea of the paragraph below. the best leaders are organized, efficient, and punctual. molly spencer, the president of the spanish club is just this type of leader. she keeps all of the club's folders and rosters neatly arranged. she has organized several events to students celebrate the spanish language, and her fund-raisers have several students pay for study spanish abroad programs. in addition, she's never been late to a meeting. molly spencer is the perfect example of a leader.