The Iberian Peninsula.
Of the European countries, the Western entrance of the Mediterranean is guarded primarily by Spain, but also by the United Kingdom on account of Gibraltar. Morocco also guards the Western entrance to the Mediterranean, but it is not a European country.
It strategically guards the western entrance to the Mediterranean Sea.
It is the entrance to the Mediterranean Sea and all of its oceanic trade and can be easily blockaded
It is the British Naval Base at Gibraltar. The Rock of Gibraltar being the famous physical feature.
What entrance? He has made many.
The lower esophageal sphincter guards the entrance of the stomach from the esophagus.
skepta
no
The rock that guards the Mediterranean is the rock of Gibraltar. It has been a symbol of British Naval strength since the 18th century.
cerbures
Cerberus
the aortic semilunar valve