The business need is the input that will help you understand the type of information that should be elicited from stakeholders. The business need is the problem or opportunity that the project is intended to address, and it provides the context and scope for the elicitation process. By understanding the business need, you can focus on eliciting the requirements that are relevant, feasible, and valuable for the project.
The other options are not correct because:
Roles and responsibilities are an input that will help you identify who should be involved in the elicitation process, but not what type of information should be elicited.
Stakeholder list is an input that will help you determine who are the sources of requirements, but not what type of information should be elicited.
Risk assessment is an input that will help you identify the potential uncertainties and threats that may affect the elicitation process, but not what type of information should be elicited.