Decomposition

The correct order of decomposition involves several distinct processes. Let's break them down step-by-step:

1. Fecal Matter (B): The decomposition process begins with the breakdown of dead organic matter by decomposers and the production of fecal matter.
2. Leaching (C): Soluble substances are washed away from the decomposing material by moisture, leaving behind concentrated organic material.
3. Humification (A): The remaining organic matter is further decomposed to form dark, stable, and carbon-rich substances called humus.
4. Mineralisation (D): The final stage where the humus is broken down into simple inorganic substances, releasing minerals back into the ecosystem.

The correct sequence of decomposition is therefore: (B), (C), (A), (D).