The risk manager should increase stakeholder risk appetite by explaining risk handling and mitigation strategies, which will help stakeholders understand how risks can be managed and reduced, making them more comfortable with the risk process.
The best way to increase stakeholder risk appetite is to explain risk handling and mitigation strategies, which are the actions taken to reduce the probability and/or impact of risks, or to enhance the opportunities. By doing so, the risk manager can help the stakeholders understand how the risks can be managed effectively and efficiently, and how the potential benefits can outweigh the potential costs. This can also increase the stakeholder confidence and trust in the risk process and the project outcomes. The other options are not appropriate ways to increase stakeholder risk appetite. Excluding risk averse stakeholders from future risk discussions can alienate them and create conflicts. Increasing the impact of all risks in the risk breakdown structure (RBS) can exaggerate the risk exposure and create unnecessary fear and anxiety. Developing a generous probabilistic cash flow model can create unrealistic expectations and lead to poor decision making. References: PMI Risk Management Professional (PMI-RMP) Examination Content Outline and Specifications, page 81. A Guide to the Project Management Body of Knowledge (PMBOK Guide) - Sixth Edition, pages 403-4042.

The project manager should apply an iterative approach to risk identification, which involves continuous risk identification throughout the project lifecycle. This will help to identify and address new risks that may arise during the project.
According to the PMBOK Guide, risk identification is the process of determining which risks may affect the project and documenting their characteristics. It is an iterative process because new risks may evolve or become known only as the project progresses through its life cycle. There are many techniques available for risk identification and assessment, such as brainstorming, interviews, checklists, SWOT analysis, cause and effect diagrams, etc. The project manager should apply an iterative approach to risk identification to ensure that all relevant risks are captured and updated throughout the project. The project manager should also involve the project team and other stakeholders in the risk identification process to obtain their input and perspectives.
The other options are not valid for the next step after explaining the importance of risk management to the team:
* Review assumptions and constraints around risks: This is a technique for risk identification, but it is not the only one. The project manager should use a combination of techniques to identify risks, not just focus on one aspect. Also, reviewing assumptions and constraints is not the same as applying an iterative approach, which implies repeating the risk identification process at regular intervals or when changes occur.
* Develop the risk response plans for identified risks: This is a step in the Plan Risk Responses process, which comes after the Perform Qualitative Risk Analysis and Perform Quantitative Risk Analysis processes. The project manager should not develop the risk response plans before identifying and analyzing the risks.
* Determine the likelihood and impact of the risks: This is a step in the Perform Qualitative Risk Analysis process, which comes after the Identify Risks process. The project manager should not determine the likelihood and impact of the risks before identifying them.
References: PMBOK Guide1, Risk Management Professional (PMI-RMP) Cert Guide