When turning left, what must you do?

When making a left turn, yielding to oncoming traffic is essential for ensuring safety on the road. Since a left turn typically involves crossing oncoming lanes, it's crucial to ensure that no vehicles or pedestrians are approaching from the opposite direction. This practice helps prevent collisions and ensures that you can turn safely without interfering with the movements of others.

Other options are not safe or appropriate actions when turning left. Speeding through a turn can lead to loss of control or accidents. Only checking one side neglects the requirement to be aware of potential hazards from both directions. Making a wide turn may not be necessary unless the vehicle's size requires it, and could infringe on the lane of oncoming traffic, creating an unsafe situation. Therefore, yielding to oncoming traffic is the most responsible and necessary action to take when turning left.