DENDROLOGY

Detailed explanation-1: -saprotroph, also called saprophyte or saprobe, organism that feeds on nonliving organic matter known as detritus at a microscopic level.

Detailed explanation-2: -All fungi are heterotrophic, which means that they get the energy they need to live from other organisms. Like animals, fungi extract the energy stored in the bonds of organic compounds such as sugar and protein from living or dead organisms.

Detailed explanation-3: -Final answer : Fungi are called saprotrophs because they get their nutrients from decomposing material.

Detailed explanation-4: -Saprobes are the group of fungi that act as decomposers, feeding on dead and decaying wood, leaves, litter, and other organic matter. To digest this they secrete enzymes that break it down. This releases and recycles vital nutrients for other organisms, and helps dispose of organic waste.

Detailed explanation-5: -Mushrooms are advanced members of a fungi group which belong to class Basidiomycetes. They grow on the dead and decaying matter like dung, old rotten logs which are rich in the organic matter. Therefore, they are saprophytic fungi.