Organisms in the Fungi Kingdom exhibit absorptive nutrition and obtain nutrients by decomposing organic matter in their environment. This is a defining characteristic of fungi.

C) Fungi Kingdom

Fungi are organisms that belong to the Fungi Kingdom. They are eukaryotic, multicellular or unicellular organisms that obtain nutrients through absorptive nutrition. This means that they obtain their nutrients by decomposing organic matter in their environment.

Fungi are heterotrophs, which means they cannot produce their own food through photosynthesis like plants do. Instead, they rely on external sources of organic matter for their nutrition. They obtain nutrients by secreting enzymes that break down complex organic compounds, such as dead plants, animals, and other organic matter, into simpler molecules. These enzymes are then absorbed by the fungi, allowing them to obtain the necessary nutrients for their growth and survival.

Key Points:
- Fungi are eukaryotic organisms that belong to the Fungi Kingdom.
- They obtain nutrients through absorptive nutrition.
- Fungi are heterotrophs and cannot produce their own food through photosynthesis.
- They decompose organic matter and obtain nutrients by secreting enzymes.
- The enzymes break down complex organic compounds into simpler molecules.
- Fungi then absorb these nutrients for their growth and survival.

Fungi play a crucial role in the ecosystem as decomposers. They break down dead organic matter, recycling nutrients back into the environment. This process is essential for nutrient cycling and the overall health of ecosystems.

In addition to decomposing organic matter, fungi can also form mutualistic relationships with other organisms. For example, mycorrhizal fungi form symbiotic associations with plant roots, providing the plants with nutrients and enhancing their ability to absorb water and minerals from the soil. Fungi can also form mutualistic relationships with certain species of algae, forming lichens.

In conclusion, organisms that exhibit absorptive nutrition and obtain nutrients by decomposing organic matter belong to the Fungi Kingdom. Fungi play a vital role in nutrient cycling and have diverse ecological relationships with other organisms.