👉 Subcontinents are geographical regions that share a common land border but do not form a single continent. They are often defined by their boundaries, such as being separated from each other by large bodies of water or mountains. For example, some subcontinents include Antarctica (which is surrounded by the South Pacific Ocean), and North America, which is divided into two parts: the northern part known as Alaska and the southern part known as Canada. These regions are often considered part of a larger continent, but