Generally, how are scientific ideas validated?

How is the national wildlife refuge system similar to the pacific region coastal program? a. both programs are concerned with providing habitats for wildlife b. both programs are primarily concerned with preserving fish species c. both programs have set aside 150 million acres of land d. both programs are under the u.s. fish and wildlife service

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Identify the examples in which sam interacts only with natural resources