Concept:In a food chain, energy and the number of organisms decrease at each successive trophic level.Explanation:Grasses are the producers at the first trophic level. Grasshoppers, which are primary consumers, feed directly on the grasses. During the transfer of energy, a large amount of it is lost as heat and during life activities. Therefore, the producer level must have more organisms and more energy than the primary consumer level. Thus, the number/quantity of grasses eaten by grasshoppers is greater than the number of grasshoppers. This supports the correct statement.Answer:Option A.