Final answer:
The statement about a person embracing the agile mindset and collaborating with colleagues in cross-functional teams being referred to as an agilist is true. Agile environments emphasize flexibility, communication skills, and sustainability.
Step-by-step explanation:
A person who embraces the agile mindset and collaborates with colleagues in cross-functional teams is indeed often referred to as an agilist. This is a true statement. In an agile environment, it is crucial for team members to be aligned with the idea of promoting sustainability and utilizing their communication and interpersonal skills to build a productive and collaborative team. Being flexible and adaptable to new challenges and workplace cultures is an important aspect of the agile methodology, which values responsiveness to change over following a set plan.