Here's why:

* Saprophytes are organisms that obtain nutrients from dead organic matter. They play a crucial role in decomposition, breaking down dead plants, animals, and other organic materials.

* Clitocybe dealbata is a mushroom that grows in lawns, pastures, and other grassy areas. It feeds on dead plant material, such as decaying roots and leaves.

* Parasites, on the other hand, obtain nutrients from living organisms, harming their host in the process. Clitocybe dealbata does not exhibit this behavior.

While some mushrooms have symbiotic relationships with trees (mycorrhizae), Clitocybe dealbata is not known to form such relationships. It's a saprophyte, relying on dead organic matter for its sustenance.