Which statements describe sustainable development?
fishing does not remove more fish from water systems than can be replaced by the number of fish that will be born to replace them.
sustainable development is development that is designed to improve the economic conditions in less-developed countries.
sustainable development is mainly a regional issue.
sustainable development means water is used at a rate that won't reduce the amount available for future use.
sustainable development policies only need to be concerned with environmental protection.
trees cannot be cut down faster than the number that will be replaced by new growth.

The correct statements are:

- Fishing does not remove more fish from water systems than can be replaced by the number of fish that will be born to replace them;

- Sustainable development means water is used at a rate that won't reduce the amount available for future use;

- Trees cannot be cut down faster than the number that will be replaced by new growth;

Sustainable development in its essence means that everything that is taken and used from the environment has to be replaced in at least the same amount so that the balance is maintained, and that will also serve in the best interest of both the people and the environment, because there will be no shortages of natural resources if this way is practiced throughout the world.

d. new methods of assembly are introduced.

explanation:

this allows for the goods to be made on a larger scale. not faster because now it is shown to be made better, hence the greater productivity in the question. it is calling for something new to be introduced.

because there are alot of mountains