lea wants to maintain strong bones as she ages. which bone - strengthening activity should she incorporate…

Brief Explanations:

Running is a weight - bearing exercise. Weight - bearing exercises put stress on the bones. This stress stimulates bone cells (osteoblasts) to build more bone tissue, which helps in maintaining strong bones. Biking is a low - impact exercise that mainly works on muscles and joints but has less bone - strengthening effect as it is not a weight - bearing activity in the same sense. Horseback riding is also relatively low - impact on bones compared to running. Yoga, while good for flexibility and balance, has a limited direct impact on bone density compared to weight - bearing exercises like running.

Answer:

running