Answer:
Option B. mutualism
Explanation: Mutualism is a symbiotic association in which both the organisms gets benefits from one another. Bees helps in the pollination by transferring pollen grains from one plant to another and in return the flowers provide food in the form of nectar to the bees and in this way both the organism gets benefited. So the relationship which is present between flower and bees
is Mutualism.