What is a provincial capital?

A provincial capital is defined as a city where a province's government is located. This is significant because it serves as the administrative center for the provincial government, housing essential political institutions, such as the legislature and the offices of various officials. The capital city plays a crucial role in the governance and functioning of the province, as it is where decisions affecting the province's policies, laws, and overall administration are made.

The other options do not accurately define a provincial capital. For example, while a site for provincial sporting events or a region for agricultural development might be important aspects of a province, they do not pertain to the governance structure. Similarly, a historical landmark does not imply any connection to a province's governmental functions. Thus, the key characteristic of a provincial capital is its role in housing the government, making the correct answer a clear choice.