Assertion: Beehives are kept in crop field during flowering period.
Reasoning:: Bees are pollinating agents and increases pollination efficiency and improves the yield .

Both Assertion (A) and reasoning (R) are correct and R is the correct explanation of A.

Bees are the pollinators of many crop species such as sunflower, Brassica, apple and pear. Keeping beehives in crop fields during flowering period increases pollination efficiency and improves the yield which is beneficial for both crop and honey yield.