Which of the following crops is dependent on honey bees for pollination?

Pumpkin is highly dependent on honey bees for effective pollination. Honey bees are important pollinators for pumpkin plants because they help transfer pollen from male flowers to female flowers, which is essential for fruit development. Pumpkins have distinct male and female flowers, and without the action of pollinators like honey bees, the fruit will not develop properly. The bees are attracted to the bright yellow flowers of the pumpkin and facilitate this transfer, making them essential for a successful pumpkin harvest.

In contrast, while crops like eggplant, grape, and okra can benefit from pollination, they are either self-pollinating or depend less on honey bee activity compared to pumpkin. Eggplant is capable of self-pollination, grapes rely on wind and some insect activity but don't require honey bees specifically, and okra is also primarily self-pollinating. Therefore, pumpkin stands out as the crop most reliant on honey bees for optimal pollination and fruit set.