Final answer:
Professional development requires an investment of time and money, which are necessary for both individuals and organizations to increase productivity and earnings. Education and training are forms of investing in human capital, which also benefit organizations. The investment in professional development includes both tangible and intangible resources.
Step-by-step explanation:
Professional development requires an investment of resources such as time and money on the part of the individual, the organization, or both. Whether it's the construction of new infrastructure, engaging in research and development, or investing in education and human capital, significant amounts of time and money are needed. Education and training investments pay off by increasing a student's or employee's productivity and ability to earn in the future. This is not limited to individual gains; organizations also benefit from nurturing a well-educated and skilled workforce, which can innovate and keep the company competitive.
Professional development does not only reside in formal education but also in continuous learning through various means such as mentorship, building a professional network, and developing soft skills. While addressing the question of investment in human capital, it's crucial to understand the multifaceted nature of costs involved, which range from the tangible, like money, to intangible investments of time and effort.