Final answer:
The Project Manager is the key figure responsible for liaising with the project sponsor, team, and stakeholders to achieve project objectives.
Step-by-step explanation:
The person responsible for working with the project sponsor, the project team, and other stakeholders to meet project goals is typically referred to as the Project Manager. The project manager plays a critical role in coordinating efforts, communicating with all parties, and ensuring that the project progresses according to plan. Just like in theatre, where the director ensures what the audience experiences is what was envisioned, a project manager in business settings ensures that the project's objectives are met and stakeholders' expectations are managed effectively.