Define mutualism in your own words.

Mutualism is a type of symbiotic relationship. It involves two organisms, in which both benefit in some way. For example, a common mutual relationship would be between a bee and a flower. The bee receives the sweet nectar to bring back to its hive while the flower is pollinated, which means seeds will be produced through time and process. Another example is humans and bacteria (the good kind). Some bacteria found inside humans aid in digestion so our food is properly broken down, which means we will be able to receive the nutrients. The bacteria gets energy from the food as well, so both organisms benefit in this scenario.

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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.