I really don’t understand this question

In the image, the strips are the skeletal muscles. Now it is asking you what is true about the skeletal muscles. And based on the options, it seams like you have learned about skeletal muscles. So now the question is basically asking you "Based on what you've learned, what is true about skeletal muscles?" And now you pick a answer.

Explanation:

I hope this helps you under stand the question :)

the answer is b: 1.4 km/hr