Which of the following describes the F-35B variant?

The F-35B variant is specifically designed for short takeoff and vertical landing (STOVL) capabilities. This unique feature allows the aircraft to operate effectively from shorter runways and even from confined spaces, which is particularly advantageous for operations from amphibious assault ships or other platforms where space is limited. The F-35B uses a swivel nozzle for its engine and additional lift fan which enables it to achieve vertical landing and takeoff.

This capability distinguishes it from other variants of the F-35, such as the F-35A, which is built for conventional takeoff and landing, and the F-35C, which is specifically designed for carrier operations with larger wings and strengthened landing gear for carrier recovery. The heavy fighter classification also does not apply to the F-35B, as its design primarily focuses on multi-role versatility, advanced avionics, and stealth rather than sheer size or weight class typically associated with heavy fighters.