What is an algorithm?

An algorithm is defined as a systematic process or set of rules for solving a problem or accomplishing a specific task. It provides a clear sequence of steps to follow, which allows for efficiency and consistency in handling data or performing computational tasks. In the context of data analytics, algorithms are vital for analyzing data, making predictions, and automating processes.

Understanding the structured nature of algorithms is key, as they must adhere to logical sequences and repeatable steps. This characteristic distinguishes them from other concepts that may lack this systematic approach.

The other options do not align with this definition. A type of database refers to a structured collection of data, which is unrelated to the step-by-step instructions that compose an algorithm. Describing an algorithm as a random set of instructions fails to acknowledge the structured and methodical nature that defines algorithms. Finally, equating an algorithm with a pivot table conflates two distinct concepts; a pivot table is actually a specific tool used in data analysis for summarizing and arranging data, rather than a set of rules or instructions for processing data. Thus, the clear and orderly framework of an algorithm is what makes answer C the most accurate choice.