What is the primary function of wealth management as explained in the context?

Wealth management encompasses a holistic approach to managing a client's financial life, which includes coordinating a wide array of financial services tailored to the client's unique needs. This is why the primary function is to offer comprehensive financial services rather than just focusing on one particular area, such as investment advice, real estate, or retirement planning.

The essence of wealth management lies in its ability to integrate various elements, such as investment strategies, tax planning, estate planning, and risk management, into a cohesive strategy that aligns with the client's financial goals and life objectives. This coordinated service ensures that clients receive tailored advice that considers all aspects of their financial situation.

In contrast, other options describe more limited functions. Providing basic investment advice does not encompass the breadth of services involved in wealth management. Managing real estate investments exclusively narrows the focus to one asset class, which is not representative of comprehensive wealth management. Similarly, focusing solely on retirement planning ignores the broader financial perspectives necessary for effective wealth management. Therefore, the correct answer highlights the central role of coordination and integration across all financial services for clients.