Final answer:
A stakeholder for a project is broadly defined as anyone who has a stake in the project, whether they are invested financially, interested in the success, or affected by its outcome.
Step-by-step explanation:
A stakeholder for a project can be best defined as someone who has a stake in (e.g., an interest in or one who may be affected by) a design project.
This includes not only those who have invested money but anyone who has an interest in the success of the project, which can range from the design team, the company employing the design team, users and customers of the product, to entities like government agencies and local community members.
Therefore, the most comprehensive answer to the student's question is all of the above, as stakeholders can be anyone who wants the project to succeed, has invested money in the project, or potentially even those who want the project to fail if they are considering the impact the project may have on them or their interests.