The answers are
B.Growing organic vegetables is more expensive than traditional methods.
C.Growing organic vegetables helps improve the health of soil, allowing for a healthier crop.<span>E.Growing organic vegetables may limit the resources available for new farm equipment.
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Answer: Positive externality
Explanation: Positive externality is the concept in which the service produced and the consumption of that service will provide benefit a third party who is not a part of the process.
While producing fertilizer , it is providing a unintentional benefit to the community surrounding(third party) by keeping the insects away through exerting gases so that they don't cause insect bites or other problem.
Other options are incorrect because negative externalities are negative consequences face by the third party in a process. Comparative externality is related with comparison and pecuniary externality is increment or decrement in market price of service by action of economic actor .
D. Building extra space in a factory to improve production
The first one let me know if you need help
