Introduction:
Computer software refers to a collection of programs, data, and instructions that tell a computer how to perform specific tasks. It is a vital component of a computer system and enables users to interact with the hardware and perform various functions. Among the given options, option B best describes computer software.

Sequences of instructions for the computer:
Computer software consists of sequences of instructions that are written in a programming language. These instructions are designed to be executed by the computer's hardware. The software instructs the computer on what actions to take, how to process data, and how to perform specific tasks. Instructions can include mathematical calculations, logical operations, input/output operations, and more.

Programs and applications:
Software can be categorized into different types, such as system software and application software. System software includes the operating system, device drivers, and utility programs that provide a platform for other software to run on. Application software, on the other hand, includes programs designed for specific tasks, such as word processing, spreadsheet management, graphic design, and gaming.

Controlling computer hardware:
Computer software serves as an intermediary between the user and the computer hardware. It provides a user-friendly interface that allows users to interact with the computer system without needing to understand the low-level details of the hardware. Through software, users can input commands, manipulate data, and receive output from the computer.

Execution and performance:
Software is responsible for managing the resources of a computer system, including memory, storage, and processing power. It ensures efficient execution of instructions, proper allocation of resources, and coordination between different components of the system. Software also enables multitasking, allowing multiple programs to run simultaneously and share resources.

Conclusion:
In conclusion, computer software is a collection of programs and instructions that enable a computer system to perform specific tasks. It serves as an interface between the user and the hardware, providing a platform for executing instructions, managing resources, and facilitating user interaction. Therefore, option B, which describes software as sequences of instructions for the computer, is the best choice among the given options.

Computer software consists of sequences of instructions (lines of code) that direct a computer to perform specific tasks or functions. Unlike hardware, which includes physical components like the CPU and memory, software is virtual and intangible.