Answer:
O Trails and greenways allow people to exercise in a safe and inexpensive manner
Explanation:
Greenways are corridors of protected open green spaces which have been created for conservation and/or recreation purposes. Moreover, trails also provide excellent options for transportation and recreation that reduce air pollution, thereby promoting the development of safe and livable communities. Both trails and greenways are ecologically friendly alternatives to make exercise and maintain a healthy lifestyle, helping communities in creating good and safe places to live, where children can safely walk or bike to and from school.