In a balanced ecosystem, the number of is far greater than the number of .

In a balanced ecosystem, the number of producers is far greater than the number of consumers.

Explanation:

An ecosystem is a biotic and abiotic system in which the living organisms or biotic components interact with the abiotic environment.

A food chain can be stated as the linear order of the transfer of energy and food when one organism is consumed or eaten by another organism. The energy flows in among the different trophic levels.

The producers form the lowermost trophic level. The highest energy in the energy pyramid exhibits by producers.  

The primary consumers are herbivores which eat plants for their food and energy. The energy in each higher trophic level decreases when the lower trophic level organism is consumed by a higher trophic level organism.  

Therefore, in a balanced ecosystem, the number of producers is far greater than the number of consumers.

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.