What is the Strait of Hormuz and why is it so important for oil?

Core Viewpoint - Iran is experiencing its worst unrest in years, leading to significant U.S. warnings against the killing of protesters and the potential resumption of its nuclear program [1] Group 1 - The unrest in Iran has escalated to a level not seen in recent years, indicating a critical situation within the country [1] - The U.S. has issued sharp warnings to Tehran, emphasizing the consequences of violent actions against protesters [1] - There is a concern regarding Iran's nuclear program, with the U.S. cautioning against any attempts to restart it amid the ongoing unrest [1]