I’m pretty sure it’s D! Brainlyist ???
There are no statements given however a centriole is made up of microtubules triplets in a 9+0 pattern (I am unsure of what level of depth is required)
Answer:
The changing variables are: v and KE
Explanation:
Given

Required: What changes?
From the formula above:



m: The mass of the skater is constant.
v: Moving up and down the track may change the velocity of the skater.
KE: When velocity changes, the kinetic energy also changes
So:
The changing variables are: v and KE