Final answer:
Israel can expect to avoid water security threats from supply interruptions in the Tigris-Euphrates Basin, as it does not rely on these rivers for its water supply, in contrast to Turkey, Syria, and Iraq.
Step-by-step explanation:
The nation that can expect to avoid having their water security threatened by supply interruptions from the Tigris-Euphrates Basin is C. Israel. Unlike the other listed nations, Israel does not rely on the Tigris and Euphrates rivers for its water supply. The Tigris and Euphrates are incredibly significant to the water security of Turkey, Syria, and Iraq since they all share this water resource.
Turkey, being the upstream nation, has more control over the flow due to its dams, such as the Atatürk Dam, which can hold the total annual discharge of the Euphrates. This affects the water availability in Syria and Iraq, both of which also have a series of dams on these rivers. Israel, on the other hand, primarily utilizes the Jordan River and desalination for its water needs, making it less affected by the water resource management decisions made in the Tigris-Euphrates Basin.