What is a blog?

A blog is defined as an online journal maintained by individuals, and this characteristic captures the essence of what a blog is all about. It serves as a personal space where individuals can express their thoughts, opinions, and experiences on various topics, often in a chronological format. This format allows for easy updates and interaction with readers through comments and shares, fostering a sense of community and dialogue.

Unlike the other options, which tend to have a more specific purpose—such as business communication, academic research, or corporate news—a blog is broader and often more personal in nature. While blogs can certainly incorporate elements of business communication or corporate news, at their core, they reflect an individual's voice and are primarily used for sharing personal insights or narratives. Thus, the correct answer encapsulates both the function and the flexibility of blogs in the digital landscape.