Answer:
By building highways, railways, and airports.
Step-by-step explanation:
Physical capital is one of the three main factors of production according to economic theory. Physical capital refers to tangible, concrete, man-made goods that are used in the process of creating goods and services. Therefore, this can include items such as machinery, buildings, offices, vehicles, etc. One of the ways in which the government of a nation can invest in physical capital is by building highways, railways and airports, as these are physical goods that allow us to create other goods and services.