based on this graph what is the best way for you to invest in human capital? skills training years of…

Brief Explanations:

Human - capital investment aims to enhance the productivity and capabilities of individuals. Education is a fundamental and comprehensive way to develop human capital as it provides knowledge, skills, and a foundation for further learning and development. Skills training is more specific, years of service mainly relates to experience accumulation in a job - context, and health care is important for maintaining human capital but education is the overarching and most fundamental investment.

Answer:

Education