The jackrabbit (Lepus californicus) is a mammal native to the arid Sonoran Desert, where daytime temperatures regularly exceed 40∘C40^\circ\text{C}40∘C.
a.[3]
The jackrabbit is adapted to survive in this hot desert environment by having exceptionally large ears. Explain how having large ears helps prevent the core body temperature of the jackrabbit from rising too high.
b.[2]
Explain why a jackrabbit may die if its core body temperature remains excessively high for a prolonged period.