Explanation
Crisis communication is the process of managing the flow of information during and after a crisis situation that threatens the reputation, operations, or survival of an organization. It aims to protect the organization's shareholder value and long-term reputation by maintaining trust and confidence among its stakeholders.
According to the ISO 22301 Auditing eBook, crisis communication is one of the key elements of a business continuity management system, as it enables the organization to communicate effectively with its internal and external parties, such as employees, customers, suppliers, media, regulators, and the public. Effective crisis communication can help the organization to minimize the negative impacts of a crisis, restore normal operations as soon as possible, and enhance its resilience and reputation in the long run. References: ISO
22301 Auditing eBook, pages 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, and 27.

Explanation
The Act phase of the PDCA cycle consists of improvement. The Act phase is the fourth and final phase of the PDCA cycle, following the Check phase. In the Act phase, the organization takes action based on what it learned from the Check phase, where it monitored and evaluated the results of the Do phase, where it implemented the plan developed in the Plan phase. The action can be one of the following options1:
If the change was successful, the organization can standardize and stabilize the change, and communicate and document the results and the lessons learned. The organization can also identify opportunities for further improvement and start a new PDCA cycle with a different plan.
If the change was not successful, the organization can identify the root causes of the failure and revise the plan accordingly. The organization can also start a new PDCA cycle with the revised plan or a different plan. The Act phase is the phase where the organization improves its processes and performance by incorporating the learning from the previous phases. The Act phase also helps the organization to sustain the improvement and prevent the recurrence ofproblems. The Act phase is aligned with the clause 10 of ISO 22301, the international standard for business continuity management systems, which requires the organization to improve its business continuity management system by taking corrective actions, addressing nonconformities, and enhancing customer satisfaction2.
References:
ISO 22301 Auditing eBook, Chapter 1: Introduction to Business Continuity Management Systems, Section 1.3: PDCA Cycle1 ISO 22301:2019 - Security and resilience - Business continuity management systems - Requirements, Clause 10: Improvement2

Explanation
A competitor is an organization or individual that operates in the same market as another organization or individual and offers similar products or services that are in direct or indirect competition with each other.
Competitors are interested parties that can affect or be affected by the organization's business continuity objectives, strategies, and performance. Competitors can also pose threats or opportunities for the organization's business continuity management system (BCMS). References: ISO 22301 Auditing eBook, page 18; ISO 22301:2019 standard, clause 3.3.1