Final answer:
Turkey is the country that emerged from the territory of the former Ottoman Empire. While areas like Iraq and Saudi Arabia were once part of the Empire, they became independent nations post-World War I.
Step-by-step explanation:
The modern-day country that emerged from the territory of the old Ottoman Empire is Turkey. The Ottoman Empire, which lasted from 1299 to 1923, at its peak encompassed parts of Europe, North Africa, the Middle East, and Arabia. Today, Turkey is the sole successor of the vast territories once under the control the Ottoman Empire, with its capital moved from Constantinople (modern-day Istanbul) to Ankara in central Turkey.
While other regions such as Iraq, Egypt, and Saudi Arabia were part of the Ottoman Empire, they did not emerge as successors but rather became independent entities after the empire's dissolution. Iraq formed from the territory of the British Mandate post-World War I, which was previously under Ottoman control. Likewise, Arabia (Saudi Arabia), which also formed part of the Ottoman domain, succeeded in separating itself from Ottoman control following the empire's defeat.