How the mushroom and the birds nest fern are different in the way they obtain food?

Mushrooms obtain food through a process called saprotrophic nutrition, where they decompose organic matter by secreting enzymes and absorbing the resulting nutrients. In contrast, the birds nest fern utilizes photosynthesis, converting sunlight into energy by using chlorophyll to capture light and turning carbon dioxide and water into glucose. Thus, while mushrooms are heterotrophic decomposers, birds nest ferns are autotrophic producers.