This is Bonnet.

The car bonnet, also known as the hood in American English, is the hinged cover that sits over the engine compartment at the front of a vehicle. Its primary purpose is to protect the engine and other vital components such as the battery, radiator, and windshield washer reservoir from external elements like dust, rain, and debris. It also provides access for maintenance and repair. Typically made from materials like steel, aluminum, carbon fiber, or fiberglass, the bonnet is designed to be both durable and aerodynamic.