Explanation:
According to International Astronomical union a planet must satisfy the following three conditions-
1. It should orbit around sun(parent star).
2. It should have enough gravity to maintain almost spherical shape.
3. It should have cleared its neighbourhood around its orbit.
Pluto does not fulfill the third criteria and hence it has been re-categorized as dwarf planet.
Mike was running at a higher speed than Mitchell
C. endothermic
An endothermic process takes heat from the surroundings while an exothermic process gives out heat to the surroundings.