The chief audit executive (CAE) should decline the request to perform a review of suspicious transactions if it is a consulting engagement, particularly because she recently worked in the organization's accounting department. The close temporal proximity (six months ago) between her managerial role in the department and the present could impair her objectivity and independence in evaluating the transactions.
Institute of Internal Auditors (IIA) - International Professional Practices Framework (IPPF), Code of Ethics

The primary objective when implementing a risk management framework is to enhance an organization's confidence in achieving its strategy. A risk management framework helps an organization identify, assess, and manage risks that could impact its ability to achieve strategic objectives. By systematically managing risks, the organization can make informed decisions, allocate resources more effectively, and improve its overall resilience, thus increasing confidence in achieving its strategic goals.
COSO's Enterprise Risk Management - Integrating with Strategy and Performance.
The IIA's Practice Guide on Risk Management.

Obtaining insurance to protect against losses due to bad weather conditions is a strategy of risk sharing. Risk sharing involves transferring a portion of the risk to another party, often through mechanisms like insurance, hedging, or outsourcing. By obtaining insurance, an organization transfers the financial impact of adverse weather conditions to the insurer, thereby sharing the risk.
Risk avoidance (A) involves eliminating the risk entirely by not engaging in the activity that generates the risk. Risk reduction (B) refers to actions taken to decrease the likelihood or impact of the risk. Risk acceptance (C) means acknowledging the risk and deciding to bear the consequences without taking steps to mitigate it.
ISO 31000:2018 Risk Management - Guidelines
COSO Enterprise Risk Management Framework

According to the International Professional Practices Framework (IPPF) issued by the Institute of Internal Auditors (IIA), the internal audit charter must be formally approved by senior management and the board.
This requirement ensures that the internal audit activity has the appropriate authority, support, and independence to carry out its responsibilities effectively. The charter defines the purpose, authority, and responsibility of the internal audit activity, providing a clear framework for its operations and ensuring alignment with the organization's objectives and governance structures.
The IIA Standards: Standard 1000 - Purpose, Authority, and Responsibility: "The purpose, authority, and responsibility of the internal audit activity must be formally defined in an internal audit charter, consistent with the Definition of Internal Auditing, the Code of Ethics, and the Standards. The chief audit executive must periodically review the internal audit charter and present it to senior management and the board for approval."

According to IIA guidance, the internal audit activity can participate in and provide consulting services that add value and improve an organization's operations. By assisting the committee and consulting with management on the organization's responses and control activities, the internal audit activity utilizes its expertise in risk management while maintaining its advisory role without compromising its independence or objectivity.
Institute of Internal Auditors (IIA) - International Professional Practices Framework (IPPF)