Final answer:
Reducing waste and using natural resources wisely is known as conservation. It includes activities like recycling and efficient resource use to protect the environment.
Step-by-step explanation:
Reducing waste and reusing natural resources is called conservation. This term falls under environmental practices that aim to protect the natural environment for future generations by managing and using natural resources wisely. Conservation involves various practices such as recycling, efficient use of water and energy, as well as protecting ecosystems and biodiversity. An example of conservation is when someone chooses to recycle paper and plastic instead of throwing them away, leading to reduced demand on raw materials and lower environmental impact.