Which is an electromagnetic wave? a. a vibrating guitar string
b. a flag waving in the wind
c. the waves that heat a cup of water in a microwave oven
d. the changes in the air that result from blowing a horn

What is the importance of having the us forest service, the bureau of land management, the us fish and wildlife service, and the national park service? to manage land resources for conservation and the development of natural resources to manage land resources for conservation and the development of urban areas to preserve historical landmarks and manage the development of urban areas to preserve historical landmarks and manage the development of rural areas