Which sentence states the author's main claim in the selection?

If you are looking to incorporate exercise into your routine, then
you should consider walking. (paragraph 1)

You're in luck, because what you're wearing right now is
probably perfect for walking. (paragraph 3)

As a result, walking helps your leg bones become stronger and resist the bone loss that typically happens as people get older.
(paragraph 4)

As a bonus, walking with a friend provides a bonding opportunity to strengthen your relationships and enjoy the company of others. (paragraph 6)

Walking helps your leg bones become stronger and resist the bone loss that typically happens as people get older.

To identify the sentence that states the author's main claim in the selection, we need to consider the main point or the overall argument of the text. In this case, the main claim is likely to be about the benefits of walking as an exercise.

Let's analyze the sentences provided to see which one best captures the main claim:
1. "If you are looking to incorporate exercise into your routine, then you should consider walking." (paragraph 1) - While this sentence introduces the idea of incorporating exercise and suggests walking as an option, it doesn't explicitly state the main claim.

2. "You're in luck, because what you're wearing right now is probably perfect for walking." (paragraph 3) - This sentence refers to appropriate clothing for walking but does not address the main claim about the benefits of walking.

3. "As a result, walking helps your leg bones become stronger and resist the bone loss that typically happens as people get older." (paragraph 4) - This sentence directly discusses the benefits of walking in strengthening leg bones and preventing bone loss, making it a strong candidate for the main claim.

4. "As a bonus, walking with a friend provides a bonding opportunity to strengthen your relationships and enjoy the company of others." (paragraph 6) - While this sentence highlights an additional benefit of walking, it does not encompass the main claim of the entire selection.

Therefore, the sentence that states the author's main claim in the selection is:
"As a result, walking helps your leg bones become stronger and resist the bone loss that typically happens as people get older." (paragraph 4)

The sentence that states the author's main claim in the selection is: "If you are looking to incorporate exercise into your routine, then you should consider walking." (paragraph 1)