What is the greatest limiting factor for plants that grow on the floor of a rain forest? a)water b)sunlight c)space d)herbivores certain virus causes a disease of the digestive system.what is the most likely source of this virus? a)air b)soil c)water d)insects process of photosynthesis untimately converts light energy into a)mechanical energy b)electrical energy c)chemical energy d)nuclear energy which of these would be the best resource to research the symptoms and treatment of hypoglycemia? a)new england journal of medicine b)natural history magazine c)daily television news d)journal of zoology