How does biodiversity help to promote natural environment​

The more diverse an ecosystem is, the more stable it is, the more productive it tends to be, and the better it is able to withstand environmental stress. Biodiversity is essential for sustaining the natural ecosystems on which humans, and all life, depend.

Explanation:

Biodiversity provide stability to the ecosystem and maintains the ecological balance. Plants and animals in ecosystem are linked to each other through food chain and food web.

Microbes decompose the dead plant parts and animals in the soil thus facilitating the nutrient return to the soil. It also boosts ecosystem productivity.

heat a spark and oxygen

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.