Final answer:
The main categories of software are application and system software. A software developer typically works in the quaternary sector of an economy. Viruses lack ribosomes and metabolic processes but have nucleic acids and glycoproteins.
Step-by-step explanation:
Main Categories of Software
The main categories of software are application and system software. Application software refers to programs designed to perform specific tasks for users, such as word processors or web browsers. System software includes the operating system and utility programs that manage computer resources at a low level, providing a platform for application software to operate. Development software, although utilized for creating software, is often considered a subset of application software, and scripting can be a part of development or application software. Both B. application and C. system are correct in this context.
Sector of Economy for Software Developer
A software developer generally works in the quaternary sector of an economy, which comprises knowledge-based activities involving services such as information technology, research and development, and strategic planning.
Characteristics of a Virus
Viruses lack certain components and processes that are fundamental to living organisms. Specifically, they lack A. ribosomes, which are necessary for protein synthesis, and B. metabolic processes, which are required for converting food to energy. However, they do have C. nucleic acid, which contains their genetic information, and often D. glycoprotein, which can be found in the virus's envelope and plays a role in infection. Therefore, A and B are the correct choices.