\begin{tabular}{l} The machines workers have to work with are considered \\ \( \begin{array}{l}\text { O human capital. } \\ \text { O financial capital. } \\ \text { O physical capital. }\end{array} \) \\ \hline\end{tabular}

The problem presents a list of types of capital that machines workers have to work with. The options provided are: 1. Human capital 2. Financial capital 3. Physical capital To analyze this, let's define each type of capital: - **Human Capital**: This refers to the skills, knowledge, and experience possessed by individuals, which can enhance productivity and efficiency in the workplace. - **Financial Capital**: This represents the funds that are available for use in the production of goods and services. It includes money, credit, and other financial resources. - **Physical Capital**: This includes tangible assets that are used in the production process, such as machinery, buildings, and equipment. Given the context of machines and workers, the most relevant type of capital that workers would directly interact with is **Physical Capital**. Thus, the answer to the question is: **O Physical Capital.**