Which excerpt from the letter to the editor includes an opinion?
1.our city currently has a dense downtown area and then a massive amount of sprawl reaching out in every direction—the sprawl takes up seventy-five percent of the city’s land.
2.we need to ask for a change at this critical juncture, as our city rapidly expands at an unprecedented rate.
3.the residents who live in these faraway suburbs often work downtown, where the majority of businesses are still located.
4.besides the business district, the city university, our two museums, and the most popular places to shop—including four grocery stores—are all in the center of the city, to name just a few key places.

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.