The most effective practice in protecting personally identifiable information (PII) from unauthorized access in a cloud environment is to utilize encryption with logical access controls. Encryption is a technique that transforms the data into an unreadable or unintelligible form, making it inaccessible or unusable by unauthorized parties. Logical access controls are the mechanisms or rules that regulate who can access, view, modify, or delete the data, based on their identity, role, or privilege. By utilizing encryption with logical access controls, the PII can be protected from unauthorized access, disclosure, or theft, both in transit and at rest, in a cloud environment. The other options are not as effective as utilizing encryption with logical access controls, as they are related to the classification, separation, or audit of the data, not the protection or security of the data. References = Risk and Information Systems Control Study Manual, Chapter 3: IT Risk Response, Section 3.3: IT Risk Response Implementation, page 145.

A risk heat map is a kind of risk matrix where risks are ranked based on their potential impact and their likelihood of occurring, which allows you to prioritize the risks that pose the greatest threat. The severity of each risk is indicated by color, usually green for low risk, red for high risk, and yellow for medium risk.
Therefore, from a single data point on a risk heat map, one can interpret the risk magnitude, which is the product of impact and likelihood. The other options are not directly related to a single data point on a risk heat map, but rather to the overall risk management strategy and context. References = Risk Assessment and Analysis Methods: Qualitative and Quantitative; What Is a Risk Heat Map, and How Can It Help Your Risk Management Strategy; CRISC Certified in Risk and Information Systems Control - Question599

The relationship owner is the person who has the authority and responsibility for managing the relationship with the service provider. The relationship owner should be accountable for ensuring that risk responses are implemented, as they are the primary point of contact and communication with the service provider. The relationship owner can also monitor and evaluate the performance and compliance of the service provider, and enforce the contractual obligations and service level agreements. The other options are not as accountable as the relationship owner, as they are related to the assessment, security, or legal aspects of the service provider, not the management or oversight of the service provider. References = Risk and Information Systems Control Study Manual, Chapter 3: IT Risk Response, Section 3.3: IT Risk Response Implementation, page 145.

Anonymous reporting mechanisms (e.g., hotlines, web portals) encourage employees to report unethical behavior without fear of retaliation. This increases visibility into otherwise hidden risks and supports early intervention.
Reference:CRISC Manual - Domain 2, Slide 125-126