What happens to the decomposition rate when detritus is rich in lignin and chitin?

It is slower

The correct answer is Option (4) – It is slower

When detritus is rich in lignin and chitin, the decomposition rate tends to be slower. Lignin and chitin are complex organic compounds that are resistant to degradation by microorganisms. As a result, they create a more challenging environment for decomposers to break down organic matter efficiently. Microorganisms involved in decomposition struggle to access and digest these compounds, leading to a slower overall decomposition process.

Therefore, the correct answer is: It is slower