Respuesta :
Answer:
d
Step-by-step explanation:
The speed is the independent variable because when it changes all the others change because it changed
The correct option is D. speed.
Given, As a person increases cycling speed, the rate of calorie burned, distance traveled, and energy also increase.
We have to find the Independent variable.
Since, Calories burned, distance traveled and Energy generated all are dependent on the speed of cycling. As the speed increases calories burned will be more.So speed is the independent variable here and the other variables all are dependent variable.
Hence the correct option is D. speed.
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https://brainly.com/question/11897796