Farmer brown sprays insecticides on his crops to kill insects. several days after spraying, he notices many dead bugs around the pond. that summer, the number of frogs around the pond was lower than ever. the frog population has declined because a) the chemical killed the frogs. b) farmer brown scared the frogs away. c) bugs are the limiting factor for the frogs. d) the chemical spray is a limiting factor for the bugs.
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