Saprobic microorganisms are important decomposers of plant litter, animal matter, and dead microbes. This is an example of a(n) .

The correct answer would be - heterotrophs (chemoheterotrophs)

Explanation:

Heterotrophs are the living organisms that are directly or indirectly depend on the autotrophs or the organisms that can make their own food for energy and growth.

Saprobic microorganism are free living organisms that get their energy from decomposing rotten or dead organic matter such as plant litter, animal matter and dead microbes. It is performed with the help of enzymes or chemicals they release to decompose such matter. they also known as chemoheterotrophs.

Thus, the correct answer would be - heterotrophs (chemoheterotrophs).