Mushroom gets its food from:
Dead and decaying plants

Mushrooms are fungi that belong to a separate kingdom called Fungi. Unlike plants, they do not have chlorophyll and cannot carry out photosynthesis to produce their own food. Instead, mushrooms obtain their nutrition from organic matter in their environment, particularly dead and decaying plants.

Decomposers:

Mushrooms are decomposers, which means they play an important role in breaking down organic matter and recycling nutrients in ecosystems. When plants die, their organic material starts to decompose, and mushrooms are one of the organisms that help in this process. They secrete enzymes that break down complex organic compounds present in dead plants into simpler forms that they can absorb and use as food.

Nutrient Absorption:

Mushrooms have a network of fine, thread-like structures called mycelium that spread through the soil or other substrates. The mycelium acts as the feeding structure of the mushroom and is responsible for absorbing nutrients. It grows through the decaying organic matter, releasing enzymes that break down complex molecules into smaller molecules that can be absorbed. The mycelium then takes up these nutrients and transports them to the mushroom's fruiting body, which is the visible part of the mushroom that we usually see.

Role in Ecosystems:

Mushrooms are not only important decomposers, but they also have a symbiotic relationship with plants. Some mushrooms form mycorrhizal associations with the roots of plants, where they exchange nutrients with the plant. In this mutualistic relationship, the mushrooms provide the plant with essential nutrients, such as phosphorus and nitrogen, while the plant provides the mushrooms with carbohydrates produced through photosynthesis.

Conclusion:

In summary, mushrooms obtain their food by decomposing dead and decaying plants. They secrete enzymes to break down organic matter, absorb the nutrients through their mycelium, and transport them to their fruiting bodies. Mushrooms are vital for nutrient cycling in ecosystems and have a symbiotic relationship with plants.