What is the purpose of conducting a pre-flight checklist?

The purpose of conducting a pre-flight checklist primarily focuses on verifying that all systems are functional before the aircraft takes off. This process is crucial for ensuring safety and operational readiness. By methodically reviewing each item on the checklist, aircrew can identify any abnormalities or issues that may affect the aircraft's performance or safety during flight. This thorough preparation minimizes the likelihood of technical problems during the journey, aligning with aviation safety protocols and best practices.

The other options, while relevant to flight operations, do not encapsulate the comprehensive intent of the pre-flight checklist. Preparing for takeoff is a part of the checklist but not its sole purpose; it's much broader in scope. Reviewing passenger lists and assessing weather conditions are important tasks, but these do not specifically relate to the mechanical and operational readiness that the checklist aims to ensure.