Can someone me? ? a farmer allows an area of a farm to be left unplanted. this is an example of

a. desertification

b. crop rotation

c. nutrient depletion

d. fields lying fallow

What refers to the existence of more than one level of government in the country

Bea was under a great deal of stress at work, and her health had started to suffer. her doctor treated her using where bea had sensors attached to various parts of her body and watched her vital signs on a computer screen until she learned to relax.

Identify why the western ports were important to the united states.