A good way to warm up for a bike ride is to swing your arms back and forth. Thus, the correct option is D.
What is Warm up?
Warm-up may be defined as some physical activities that should be performed before entering the main game, contest, or event.
While riding a bike, it is more important to keep your hands on the actual positions and it is the only body part that remains in place without any movement throughout.
So, before a bike ride, it is required to warm up your hands and arms and keep enough practice and movement of them.
Therefore, the correct option for this question is D.
To learn more about Warm up, refer to the link:
https://brainly.com/question/1516346
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