Examples of good management to maintain or restore the balance of nature are: duplicate natural processes of the environment. adjust living things to the environment. introduce new substances or species if another alternative is suitable. make decisions on biology, ecology, and environmental conditions. use resources available.

Answer: Well all of your examples are correct. But I'm having an issue with "introducing new substances or species".

Explanation: It's more difficult than you can imagine, introducing new stuff into an enviroment (any kind) that has existed for thousand or even millions of years is not that simple. I mean, yes. The enviroment has experimented all kind of changes: extinction of species, annihilation via flood or massive fires. But the cause is always familiar, bornt from the enviroment. Or at least directly relationated with it. There are literally like a dozen of movies that talks about why introducing new species to an enviroment it's a bad idea.