Biology

The correct answer is: D.Fungi.

Here’s why:

1.Multicellular organism with cell walls made of chitin: This description is characteristic of fungi, which have cell walls composed of chitin. Chitin is a tough, nitrogen-containing polysaccharide that is distinct from the cellulose found in the cell walls of plants.

2.Found growing on a decomposing manure pile: Fungi, especially molds and mushrooms, are well-known for their role in decomposition. They break down organic matter such as dead plants, animals, and manure. This makes them important decomposers in ecosystems.

Let's review why the other options are not correct: