Ilike to twirl my body but keep my head up high. after i go in, everything becomes tight. what am i?

What is the function of the organelle labeled a in the diagram?

When approaching an emergency vehicle, law enforcement vehicle, or tow truck stopped on a two-lane road with a speed limit of 20 mph or less, you are required to a. slow down to 10 mph b. slow down to 5 mph c. stop and offer assistance d. pass the vehicle in an opposing lane, if safe

Ineed an answer for this one (number 8)