Step 1: Social capital covers trust, networks and mutual understanding among people, so option 1 is true. Step 2: Human capital includes skills and knowledge, so knowing how to operate a machine is intangible human capital, making option 2 true. Step 3: Physical capital means man-made tools, machines and buildings, while natural capital means land, water and other natural resources. These are two separate categories, so option 3 is false. Step 4: Education builds skills and is a standard example of investment in human capital, so option 4 is true. The false statement is option 3.