A risk heat map is a tool that shows the likelihood and impact of different risks on a matrix, using colors to indicate the level of risk. A risk heat map is most commonly used as part of an IT risk analysis to facilitate risk assessment, which is the process of estimating the probability and consequences of the risks, and comparing them against the risk criteria1. A risk heat map can help to visualize, communicate, and prioritize the risks, as well as to evaluate the effectiveness of the risk response actions2. The other options are not the best choices for describing the purpose of a risk heat map, as they are either less specific or less relevant than risk assessment. Risk communication is the process of sharing and exchanging information about the risks among the stakeholders3. A risk heat map can support risk communication by providing a clear and concise representation of the risks, but it is not the main objective of the tool. Riskidentification is the process of finding, recognizing, and describing the risks that may affect the organization4. A risk heat map can help to identify the risks by categorizing them into different domains or sources, but it is not the primary function of the tool. Risk treatment is the process of selecting and implementing the appropriate measures to modify the risk5. A risk heat map can help to guide the risk treatment by showing the risk ratings and thresholds, but it is not the core purpose of the tool. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 2, Section 2.1.1, Page 47.