Final answer:
Infinity-Investments Inc.'s practice of sending managers to different international branches for projects exemplifies Leadership Development, as it enhances their skills and broadens their experience.
Step-by-step explanation:
The approach taken by Infinity-Investments Inc., where managers are sent to various international branches to handle projects and gain exposure to a diverse work climate, best illustrates Leadership Development. This practice incentivizes managers to learn from different cultural and business environments, thereby enhancing their leadership skills and broadening their experience. Upon returning, they can use this valuable experience to positively influence their subordinates and integrate new perspectives into their home branch's operations.