The term "check blind spots" mentioned in the options refers to the requirement for drivers to check their rearview mirrors and side mirrors, as well as to look directly over their shoulders at the blind spots on both sides of the vehicle, before changing lanes or making a turn. This is a safety operation procedure aimed at enhancing driving safety and reducing collisions between vehicles, and it is not considered a distracting behavior while driving. Instead, it is a recommended safety habit that helps ensure safety during lane changes or turns. On the other hand, actions such as using a hands-free phone, being hungry, and texting while not looking at the phone, although varying in degree, are all behaviors that may distract the driver and potentially decrease safety while driving.