What best illustrates the idea that "anatomy can provide clues to physiology"? Group of answer choices The longer alimentary canal in herbivores helps with digestion of tough plant matter Freshwater fish conform to ambient temperature, but not to the osmolarity of their environment Heat moves from warm to cold objects Vitamin B2 is used to make a molecule called flavin adenine dinucleotide (FAD) Ectotherms primarily gain heat from external sources.