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read the excerpt from a passage about wind energy.

there is concern that wind turbines are affecting weather patterns near wind farms. the spinning blades on turbines create turbulence in their wakes like the wake of a boat.

which description best explains the meaning of the word turbulence?

a) a slight breeze

b) a wavy motion of the wind

c) the forceful movement of air

d) a circular spin of the blades