Explanations:A landlocked country is defined as a country that is entirely enclosed by land, with no direct access to the open ocean. This means that the country must be completely surrounded by one or more other countries, with no coastline on any open sea or ocean. Lesotho is a unique example of a landlocked country because it is entirely surrounded by South Africa, making it the only country in the world that is 100% landlocked by another country.
Lesotho is a small, mountainous country located in southern Africa. It is completely enclosed by South Africa, which means that all of Lesotho's borders are shared with South Africa. This geographical arrangement makes Lesotho a unique case in the world, as it is the only country that is entirely surrounded by a single other country. This situation is not common, as most landlocked countries are surrounded by multiple countries or have access to closed seas.
Other options in the question, such as Ghana, the Democratic Republic of the Congo (DRC), and Tanzania, are not landlocked by South Africa. Ghana is a coastal country located on the Gulf of Guinea in West Africa, with a significant coastline. The DRC is a large country in Central Africa that has a border on the Atlantic Ocean. Tanzania is a coastal country in East Africa with a coastline on the Indian Ocean. These countries are not surrounded by South Africa and do not fit the criteria of being 100% landlocked by South Africa.
Understanding the concept of landlocked countries and their geographical relationships is important in geography and international relations. Lesotho's unique position as a country entirely surrounded by South Africa highlights the importance of understanding the specific geographical and political relationships between countries, especially in the context of landlocked states.