Question

Which combination can produce an inverted pyramid of numbers?

Options

• Phytoplankton, zooplankton, and top consumers in an oceanic ecosystem

• Producers, herbivores, and carnivores in a well-balanced ecosystem

• Insects on a single tree, smaller birds feeding on those insects, and parasites on those birds

• Sunlight, NPP, and heat at each step

Answer 1

A single tree may support many insects, and birds feeding on them may support numerous parasites. This arrangement produces an inverted pyramid of numbers.