Concept:A crop pest is an organism that damages or destroys cultivated plants.
Explanation:Birds feed on grains and fruits, so they damage crops.
Rodents eat planted seeds, tubers, and stored farm produce.
Grasshoppers chew and destroy the leaves and stems of crop plants.
Bed bugs, however, feed on the blood of humans and animals.
They do not attack or feed on crop plants.
Therefore, bed bug is not a crop pest in the farm.
Answer:The correct option is C. Bed bug.