NSES Content Standard F  
Science in Personal and Social Perspectives: Types of resources 
Grades K-4, page 140 

Resources are things that we get from the living and nonliving environment to meet the needs and wants of a population. 

Benchmark 5D The Living Environment: Interdependence of Life
Grades 6-8, page 117
In all environments--freshwater, marine, forest, desert, grassland, mountain, and others--organisms with similar needs may compete with one another for resources, including food, space, water, air, and shelter. In any particular environment, the growth and survival of organisms depend on the physical conditions.