What action should be taken if windshear is encountered during an approach for landing?

When encountering windshear during an approach for landing, executing a go around is the appropriate action to take. Windshear can create sudden and unpredictable changes in wind speed and direction, which can greatly affect the aircraft's performance, particularly during the critical phases of flight such as landing.

Opting for a go around allows the pilot to safely reposition the aircraft to a stable altitude and speed, providing an opportunity to reassess the situation and select a better approach or landing condition. This decision is crucial for maintaining control and ensuring the safety of the aircraft and its occupants, as continuing to land in the presence of windshear can lead to complications such as stall or loss of control.

Other choices, such as continuing landing, reducing power, or maintaining current speed, do not account for the potential hazards associated with windshear and can compromise safety. Each of those actions could exacerbate the impact of the windshear, leading to instability and increased risk during landing. Therefore, executing a go around is the most prudent and safe course of action.