Question

to see other vehicles that may be in your blind spot, you must
physically turn your head to check the blind spot
check your left mirror
check your right mirror
check your rearview mirror

Explanation:

Blind spots are areas around a vehicle that are not visible in the side or rear - view mirrors. To see vehicles in the blind spot, one must physically turn their head to check, as the mirrors do not cover these areas. Checking just the left, right, or rear - view mirrors is insufficient to detect vehicles in the blind spot.

Answer:

physically turn your head to check the blind spot