From the type of workers given in Column I, identify the correct nature of work in Column II:
Cement shop owner: Classified as self-employed because they manage and operate their own business.
Construction worker: Categorized as a casual wage worker due to temporary and project-based work.
Civil engineer: Falls under regular salaried, as they are typically employed by organizations on a long-term basis.
During the British rule, India’s foreign trade had various features except _________ .