Answer:
To adapt to the high heat of the desert, the desert kit fox evolved ears with greater surface area, which allows for more efficient removal of excess body heat
Explanation:
As a result of the evolutionary process that occur among the population of species of fox, which most probably must have belong to the same descendant species, the forest kit fox population and the desert kit fox population have become dissimilar in terms of ear size. This divergence can best be explained as a result of the need for the desert kit fox to be better adapted to deal with excess heat in the desert, hence, have evolved larger ears for the purpose of effective losing of excess heat. Heat loss is more effective as a result of larger surface area the ears of the desert kit fox.