Select four variables that affect farm incomes. trade barriers
hectares
policies and regulations
natural resources
rural development
nutrition
global supply and demand
of the weather

c. would be the answer : )

explanation:

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producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.