Which of the following are the ways of conserving and preserving the earth's natural resources?
Using alternative energy sources
Reducing the wastage of non-renewable natural resources
The correct option is B All of these
Preservation refers to the measures taken to keep living things in their original balanced state. Conservation refers to the careful and systematic use of natural resources without causing harm and death to living organisms in the environment. Recycling of waste, reducing the use of non-renewable natural resources and alternative source are the measures to maintain the natural resources without harming the resources and environment. Thus, the correct answer is option D.