Select all that apply: carbohydrates : in the body are primarily fatsb: are primarily sugars and starchesc: are the most readily available source of energy for organismsd: are the largest of the four main biological macromolecules

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred