Final answer:
Coastal plains are rich in resources like agricultural land and fisheries and usually have significant population centres with primate cities. They experience environmental challenges and have dynamic population dynamics.
Step-by-step explanation:
Coastal plains offer a diverse range of resources due to their geographical features, including rivers, tidewater streams, and wetlands. These landscapes provide natural resources like fish and a favourable environment for agriculture. However, over-exploitation of these resources can lead to environmental concerns such as deforestation, soil erosion, and loss of biodiversity, as seen in regions like Yemen. Coastal plains also tend to have significant population centres, with primate cities that serve as cultural and economic hubs. Primate cities, such as capitals in the Southern Cone, often have a higher percentage of the country's population, reflecting a trend of urbanization and higher standards of living.
In terms of population dynamics, coastal plains experience various pressures due to their economic opportunities and living conditions, which can lead to migration, urban expansion, and challenges such as the need to adapt to changing ecosystems. These factors contribute to the unique economic and social fabric of the coastal plains, where the balance between resource utilization and sustainable development is critical.