Final answer:
The Strait of Dover connects the North Sea with the English Channel, separating the United Kingdom from France, not Spain or Portugal.
Step-by-step explanation:
The Strait of Dover is a narrow waterway that connects the North Sea to the English Channel. It separates the United Kingdom from the European mainland, specifically from France. This strait is the narrowest part of the English Channel and serves as a significant passage for maritime traffic. The separation of land between the UK and continental Europe contributes to the distinct identities that the regions have developed over time, akin to how the Strait of Gibraltar operates as a bridge between Europe and Africa. However, it is important to note that the Strait of Dover is not related to any countries such as Spain or Portugal, as mentioned in the reference to the Strait of Gibraltar.