Correct Option (b)
Cultural eutrophication is characterized by significant ecological degradation. As per the passage, "important ecosystem services are lost, including the provisioning service of wild-caught fish and cultural service associated with recreation." This directly affirms Statement 1. Additionally, the passage states that eutrophication "eliminates large plants and, in the worst situations, leads to anoxia and fish kills," which indicates a loss of both flora (large plants) and fauna (fish). This supports Statement 2. Therefore, both characteristics 1 and 2 are accurate descriptions of a water body experiencing cultural eutrophication.
Incorrect Options:
Statement 3, "Loss of mineral nutrients," is incorrect. The passage explicitly attributes cultural eutrophication to "The excess input of the nutrients, both nitrogen and phosphorus – based," which leads to "high phytoplankton productivity." This indicates an overabundance of mineral nutrients, not their depletion. Consequently, any option including Statement 3 (options c and d) is incorrect. Option (a) is also incorrect as it only includes Statement 1, omitting the valid Statement 2.