Identify the organisms that initiate the detritus food chain or food web.

The slow rate of decomposition of fallen logs in nature is due to their

Fungi in a forest ecosystem is

Decomposers are

Most diverse organisms of an ecosystem are

Choose the correct sentences from the options:
$(1)$ Decomposition is largely an oxygen-requiring process.
$(2)$ Warm and moist environment slows down the decomposition process.
$(3)$ Decomposition rate is slower if detritus is rich in lignin and chitin.
$(4)$ Humus is colloidal in nature and it serves as a reservoir of nutrients.