The correct answer is Mushroom. Explanation & Key Takeaways: • Mushrooms are fungi that obtain nutrients by breaking down organic material outside their body and then absorbing the digested nutrients. • They secrete digestive enzymes into the environment to decompose complex organic matter into simpler substances. • This extracellular digestion allows mushrooms to play a crucial role in nutrient cycling in ecosystems by decomposing dead organic material. • Mushrooms, along with other fungi, are essential decomposers in many ecosystems, recycling nutrients back into the soil. Related Concepts: • Extracellular Digestion: • This process involves the breakdown of food outside the organism's body through the secretion of digestive enzymes. • Enzymes convert complex organic materials into simpler molecules that can be absorbed by the organism. • Roles of Fungi: • Fungi are primary decomposers in many ecosystems, breaking down dead organic material and recycling nutrients. • They form symbiotic relationships with plants (mycorrhizae) to enhance nutrient uptake. • Types of Fungi: • Mushrooms are a type of fungi known as basidiomycetes, which produce spores on basidia. • Other fungi include molds (zygomycetes) and yeasts (ascomycetes). • Nutrient Cycling: • Fungi play a crucial role in nutrient cycling by decomposing organic material and releasing nutrients back into the soil. • This process supports plant growth and maintains ecosystem health.