Explanation
The Do phase in the PDCA cycle consists of operation, which means implementing and operating the business continuity policy, controls, processes, and procedures that have been planned in the previous phase. The Do phase also involves establishing the necessary resources, competencies, awareness, communication, and documentation to support the effective operation of the business continuity management system (BCMS). The Do phase aims to ensure that the organization is prepared to respond to and recover from disruptive incidents in a timely and effective manner. References: ISO 22301 Auditing eBook, pages 9, 10, 11, 22, 23, and 24.

Explanation
According to the ISO 22301 Auditing eBook, likelihood is defined as "the chance of something happening, whether defined, measured or determined objectively or subjectively, qualitatively or quantitatively, and described using general terms or mathematically (such as a probability or a frequency over a given time period)"1. Likelihood is one of the factors that determine the level of risk, along with the impact or consequence of an event. The probability of a threat or risk to occur is therefore equivalent to the likelihood of that event.
References: : ISO 22301 Auditing eBook, Chapter 3: Business Continuity Management System, Section 3.2:
Terms and definitions, Page 23.