Final answer:
The Project manager (option D) is responsible for site selection for Concrete Constructions' new residential complex, as it involves aspects of project management and strategic planning.
Step-by-step explanation:
The responsibility of selecting a suitable site for establishing a new residential complex typically falls to the Project manager of Concrete Constructions. Selecting a site takes into consideration several factors of production such as land, labor, and capital, and is crucial for the profitability of the business. A Project manager is well-versed in considering all these aspects, including the cost of land acquisition, availability of labor, access to resources, and the potential ROI stemming from the project's completion. Furthermore, elements such as transportation access, local regulations, and community impact are also considered during the site selection process.
When discussing human labor in construction, it is important to consider that labor can be both physical and mental. This includes everything from manual work by construction workers on the site to the analytical tasks performed by managers and engineers.