What needs to be taken care of in the friction zone?

• The rider must coordinate the slow release of the clutch lever while gently using the throttle to achieve a smooth start and prevent engine stalling.
  Explanation:

  "It is in this friction zone that the rider must coordinate the slow release of the clutch lever while gently using the throttle to achieve a smooth start and prevent engine stalling."
• The rider must coordinate the fast release of the clutch lever while quickly using the throttle to achieve a smooth start and prevent engine stalling.
• The rider must coordinate the slow release of the clutch lever while gently using the throttle to achieve a quick start and prevent engine stalling.
• The rider must coordinate the slow release of the clutch lever while gently using the throttle to achieve a smooth start and to ensure engine stalling.