How did high volcanic islands differ from coral atolls in the Federated States of Micronesia?

In the Federated States of Micronesia, islands are categorized into two primary types based on their geological formation and environmental characteristics:

High Volcanic Islands

These islands are elevated landmasses formed by volcanic activity. They are characterized by:
* Topography and Soil: They feature mountainous terrain with richer, more fertile soil compared to atolls.1
* Vegetation: The fertile environment supports a diverse range of plant life, including mangrove swamps along the coast, grasslands, and tropical rainforests in the interior.1
* Settlement: While people often sought access to lagoons, they also utilized defensible locations such as the tops of steep, cleared slopes for housing.2

Coral Atolls

Atolls are low-lying structures formed atop coral reefs that enclose a central lagoon. They differ from high islands in several ways:13
* Soil and Resources: They possess poorer, limited soil quality and depth. Fresh water is scarce, typically stored in a lens-shaped layer above heavier saltwater within the porous coral.145
* Vegetation: Plant life is less varied, dominated by coconut palms, pandanus, and breadfruit trees.1
* Settlement: Inhabitants traditionally preferred the lagoon side of these islands for easier canoe launching and protection from cyclones.2