Concept:A pyramid of numbers shows the number of organisms at each trophic level in a food chain.
Explanation:The given chain, Grasses → Grasshoppers → Lizards → Hawks, shows the transfer of food energy through different trophic levels.
Many individual grasses form the base of the food chain.
Grasshoppers feed on grasses, so there are usually fewer grasshoppers than grass plants.
Lizards feed on grasshoppers, so lizard numbers are lower still.
Hawks are top carnivores and have the smallest number of organisms.
When these numbers are represented on a bar chart with bars stacked from the producers upward, the bars become progressively narrower.
This gives an upright, tapering shape, which is called a pyramid of numbers.
Answer:A. numbers