Final answer:
Mangroves provide ecological services such as coastal protection, biodiversity support, and carbon sequestration, but they do not prevent desertification.
Step-by-step explanation:
The correct answer is d) Desertification prevention. Mangroves provide various ecological services such as coastal protection, biodiversity support, and carbon sequestration. Coastal protection refers to the role mangroves play in reducing erosion and mitigating the impact of storms and waves on coastal areas. Biodiversity support refers to the diverse range of plant and animal species that rely on mangroves for habitat. Carbon sequestration refers to the ability of mangroves to absorb and store carbon dioxide, helping to mitigate climate change.