Why and how is US blockading Iranian ports in Strait of Hormuz?

The US has initiated a naval blockade of Iranian ports, allowing ships from other countries to pass through the Strait of Hormuz. This action aims to restrict Iran's oil exports and exert economic pressure on the country. In response, Iran has labeled the blockade as 'piracy' and threatened retaliation. Experts warn of the risks of rising oil prices and a potential resumption of hostilities between the US and Iran.