Chọn câu kết luận (concluding sentence) phù hợp cho mỗi đoạn văn.

Walking is a fantastic way to get around. Firstly, it's free – you don't need to spend money on transportation. Secondly, you can walk anywhere, making it super convenient. Thirdly, walking outside is not just good for your body; it also makes you feel happy. __________.