The correct answer is b) Loss of native species.
Monoculture plantations are large areas of land planted with a single crop. This can lead to a loss of native species, as the plantation takes up space that would otherwise be used by other plants and animals. Monoculture plantations can also disrupt the natural ecosystem, as they may not provide the same habitat and food sources as a diverse range of plants and animals.
Option a) Increased biodiversity is incorrect, as monoculture plantations typically have a lower diversity of plants and animals than natural ecosystems.
Option c) Soil enrichment is incorrect, as monoculture plantations can actually lead to soil degradation, as the same crop is grown year after year without any rotation. This can deplete the soil of nutrients and make it more susceptible to erosion.
Option d) Improved water conservation is incorrect, as monoculture plantations can actually lead to water shortages, as the same crop is often grown in areas that are already water-stressed. This is because the crop may not be adapted to the local climate and may require more water than native plants.