When energy-yielding nutrients are consumed in excess, which one(s) can lead to increased storage of fat?

Which phrase is most likely to start a description of a scientific theory? “what i have found through my online research is . .” “after much thought, i believe that the best explanation is . .” “based on the observations made and experiments performed over the last fifty years . .” “if sunlight shines on the right side of a plant, then the plant will grow toward the right because . .”

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time

What are some characteristics of a free enterprise economy?