What phyla is non-motile eukaryotic decomposers?

The above mentioned description is true for the  members of kingdom Fungi. A eukaryotic organism characterized by the presence of chitin in its cell wall is called fungi. Some of the defining features of this group include the absence of chloroplast, presence of nuclei that are membrane-bound, production of spores and presence of hyphae.

Explanation:

The members of this kingdom are non motile and posses the property of decomposes. Besides it helps in the process of nutrient cycling and its exchange as it is a decomposer. The presence of chitin in their cell wall is the unique feature of the fungi that explains its presence in a separate kingdom. They are heterotrophic in nature and perform symbiotic associations. They have the ability to secrete digestive enzymes that helps in the absorption of dissolved molecules. They also serve the purpose of decomposers in the ecosystem. They have the ability to reside in extreme environments.

"d.) carbon dioxide and hydrogen sulfide"