The answer is B for this question.
It was a way for them to stick to their heritage and devise planes
I think its C.locate key Info Because if you reread the paragraph you will find some sentences that will help you.
Answer:
1 D 2 B 3 B 4 A
Explanation: hope this helps you :)
If you are looking for a sentence in that paragraph to support the main idea, I think it would be "All it requires is a good pair of sneakers-no cables, stylish outfits, or weights required. The main idea is basically that walking is a good and easy way to begin exercising, and that explains it.