Question

how do fungus get their energy?

Explanation:

Fungi are heterotrophs, meaning they cannot produce their own food through photosynthesis (unlike plants). Most fungi are saprophytic, which means they obtain energy by decomposing dead organic matter (such as dead plants, animals, or other organic debris). They secrete enzymes onto the organic material, which break down complex molecules (like carbohydrates, proteins, and lipids) into simpler substances. These simpler substances are then absorbed by the fungi to be used for energy production (through processes like cellular respiration) and for building fungal biomass. Some fungi are also parasitic, obtaining energy by living on or in a living host organism and absorbing nutrients from the host, which can sometimes harm the host.

Answer:

Fungi obtain energy by being heterotrophs: most are saprophytes, secreting enzymes to decompose dead organic matter (like dead plants/animals) into absorbable simple substances for energy (via cellular respiration) and biomass; some are parasites, absorbing nutrients from living hosts.