The careful use of resources is called conservation recycling deposition composting

The careful use of resources is called conservation.

Explanation:

In the field of environmental studies, the term conservation refers to the prevention of wasteful use or depletion of a resource. This is the reason why the term conservation collocates with -of wildlife, -of rivers, -of forests, etc. to describe the preservation and protection of those natural resources and prevent their harmful exploitation.

i got 3,4 and 5 as an answer

permafrost layer, it exists beneath a layer of soil, rock or sediment.