Concept:A landlocked country is one that has no direct access to the sea or ocean coastline.
Explanation:Landlocked countries, such as Mali, Niger, and Zambia, must rely on neighbouring coastal states to reach seaports for international trade.
This reliance makes them politically vulnerable because their imports, exports, and economic activities depend on decisions made by other nations.
The dependence on transit countries is a major geographical problem for landlocked states.
They also face high transport and freight costs, since goods must travel long distances across many borders, not low freight costs.
Hence, political dependence is a recognised problem of landlocked countries.
Answer:D. Political dependence