Final answer:
Erosion of beaches is least likely to be an ecosystem service as it is usually a negative outcome rather than a beneficial one provided by the ecosystem. Therefore correct option is B
Step-by-step explanation:
The question asks which of the listed options is least likely to be considered an ecosystem service. Ecosystem services are benefits provided by ecosystems that support human life and economic activity, such as protection from severe weather, provision of food, and provision of ceremonial items. Among the options given, 'erosion of beaches' is least likely to be considered an ecosystem service because it is typically seen as a negative consequence of natural processes rather than a beneficial service.