Which of the following defines agility?

Agility is fundamentally defined as the ability to embrace, adapt, and respond to change effectively and efficiently. In a project context, this means welcoming changing requirements, even late in development, and using change for the customer's competitive advantage. Agile environments are structured to be flexible and to allow for rapid course correction based on feedback and evolving circumstances, which is the essence of being agile.

A. The set of activities that define the sequence of actions: This is a definition of a process or a plan, which can be either agile or traditional.
C. The ability to protect from uncontrolled changes: This describes traditional change control. Agility seeks to manage change flexibly, not just protect the project from it.
D. The core belief that anyone is capable of learning: This describes a growth mindset, which is a valuable attribute for an agile team, but it is not the definition of agility itself.

- AXELOS. (2022). PRINCE2 Agile® Foundation, 2nd Edition. Section 3.1. "In its simplest form, agility is the ability to adapt and respond to change."

- Beck, K., et al. (2001). Manifesto for Agile Software Development. The principles behind the manifesto emphasize "Welcoming changing requirements, even late in development. Agile processes harness change for the customer's competitive advantage."