All of the following contribute to the decrease of biodiversity EXCEPT - ( NEED ASAP )

conservation of natural resources

Explanation:

You're trying to save resources, all the other options cause harm

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

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.