Answer
Sustainable development is development that is designed to improve the economic conditions of populations in the world's less-developed countries (LDC s).
Explanation
sustainable development are the well organised principles which are set with a purpose of meeting peoples development goals. It is designed in a way such that it describes an economy in equilibrium with basic ecological support systems.
it meets the world's current needs while making sure that resources will be available to meet future needs.
Some of its main goals are to make sure that there is gender equality,people are entitled to good health ,there is enough clean water and sanitation,eradication of poverty,good education and a reasonable economic growth among others.
The right options would be: (1) Fishing does not catch more fish than the number of fish that will be born to replace them. (2) Sustainable development means water use is kept at a level that doesn't reduce the amount available for future use. (3) Sustainable development policies must consider both environmental protection and economic development.
Also, if the option "Trees cannot be cut down at a rate..." is completed by "that doesn't let them grow back" it'd be right too.
In other words, sustainable development searches for the balance between progress and environmental protection and to stop using non-renewable resources in order to preserve them. Sustainable development is also practiced worldwide because one countries' actions affect another one's.