Answer:
b. both the beekeeper and the orchard owner
Step-by-step explanation:
Options "a. only the owner of the orchard b. both the beekeeper and the orchard owner c. the beekeeper, but it creates a negative externality because the bees are a hazard to the orchard. d.only the beekeeper"
Externality is when the cost or benefit of any activity falls upon the bystander and it can either be positive or negative. The Positive externality is when the benefits is enjoyed by the third party or the bystander. The Negative externality is when the costs fall upon the bystander.
Honey bees are very good pollinating agents, the rearing of honey bee not only benefits the beekeeper by producing honey but also the plants by helping them pollinate and increase the flora of the area, that is, it is also helping the orchard owner by increasing his tree count and hence fruit yield.