Civil is a process of design, construction, and maintenance of the physical and naturally built environment, including works like roads, bridges, canals, dams, and buildings.
Interior design is the art and science of enhancing the interiors, sometimes including the exterior, of a space or building, to achieve a healthier and more aesthetically pleasing environment for the end user. An interior designer is someone who plans, researches, coordinates, and manages such projects. Interior design is a multifaceted profession that includes conceptual development, space planning, site inspections, programming, research, communicating with the stakeholders of a project, construction management, and execution of the design.
MEP is a type of engineering which focuses on the disciplines needed to build safe, working structures for human use and occupation. The mechanical aspect focuses on heating, cooling and ventilation, and the electrical aspect focuses on providing power to all outlets and appliances. The plumbing aspect focuses on the delivery of water and the draining of waste water.