Fungus are heterotrophs, meaning they cannot make their own food like plants do through photosynthesis. Instead, they obtain nutrition by absorbing nutrients from their surroundings. Here's a breakdown of the types of nutrition performed by fungus:

* Saprotrophic: This is the most common type of fungal nutrition. They feed on dead organic matter, such as decaying leaves, wood, and animal remains. They release enzymes that break down these materials into simpler compounds that they can absorb.

* Parasitic: Some fungi obtain nutrition by living on and feeding off a living host organism. They can cause diseases in plants, animals, and even other fungi. They use specialized structures to penetrate their host and extract nutrients.

* Mutualistic: In this type of relationship, both the fungus and another organism benefit. A common example is mycorrhizae, where fungi form a symbiotic relationship with plant roots. The fungus helps the plant absorb water and nutrients, and the plant provides the fungus with sugars produced through photosynthesis.

Key Points:

* Fungi are heterotrophic, meaning they obtain nutrients from other organisms.

* They are decomposers, playing a vital role in recycling nutrients in ecosystems.

* They can be saprotrophic, parasitic, or mutualistic.