The suitable location for keeping the beehives is near the crop of :

Brassica

The correct answer is Option (3)- Brassica

Brassica crops: This category includes plants like mustard, cabbage, broccoli, and cauliflower. These plants flower abundantly, providing a rich source of nectar and pollen for bees.

Bee needs: Bees need a consistent and readily available source of nectar and pollen throughout their active season. Brassica crops often have long flowering periods, making them a good choice for beekeepers.