An organic organizational structure is more flexible and adaptive compared to a mechanistic structure. It is characterized by less formalization, decentralized decision-making, and a greater reliance on lateral communication. This type of structure is beneficial in environments that are dynamic and uncertain, such as when an organization faces strong political and social pressures. The flexibility of an organic structure allows the organization to respond more effectively to external changes and pressures.
This concept is supported by organizational theory literature, which suggests that organic structures are better suited for turbulent and changing environments where quick adaptation is necessary.

Entity-level controls set the tone and establish the framework for the overall control environment within an organization. If these controls are poorly designed or deficient, they can undermine the effectiveness of process-level controls, even if those controls are well-designed. Entity-level controls include governance, risk management, and compliance controls that influence the entire organization. Therefore, deficiencies at this level can have a widespread impact, preventing lower-level controls from functioning properly.
Institute of Internal Auditors (IIA), International Standards for the Professional Practice of Internal Auditing (Standards), Standard 2130 - Control.

According to the Institute of Internal Auditors (IIA) guidance, the independence and objectivity of the internal audit function are fundamental principles. Independence is compromised if the internal audit function takes on roles or responsibilities that are part of management's duties. Coordinating and managing the risk management process is a management responsibility. If internal auditors assume this role, it impairs their ability to remain independent and objective when auditing the effectiveness of the risk management process.
References: IIA Standard 1112 - Chief Audit Executive Roles Beyond Internal Auditing

Internal auditors generally determine the priority of the areas within the engagement scope by assessing the risk of those areas. This involves estimating the likelihood of a risk occurring and the potential impact of that risk on the organization. High-risk areas with a high likelihood of occurrence and significant impact are prioritized to ensure that critical risks are addressed promptly. This risk-based approach to prioritization helps ensure that the audit resources are focused on the most significant areas, enhancing the effectiveness and efficiency of the audit.
The Institute of Internal Auditors (IIA) - Standards for the Professional Practice of Internal Auditing, Standard
2010 - Planning

A gap analysis is used to assess the completeness of sales invoices by identifying any missing records within a sequence. This technique helps in pinpointing any sales that might have been omitted or unrecorded during the invoicing process. By comparing expected sequences with actual recorded transactions, the auditor can identify discrepancies and ensure all sales are accounted for.
The Institute of Internal Auditors (IIA) Practice Guide: Data Analytics IIA Standard 2320 - Analysis and Evaluation