Which type of website acts as a digital diary and allows for personal expression?

A blog is specifically designed for personal expression and is often maintained by an individual or a small group. It serves as a platform where authors can share their thoughts, experiences, and various topics of interest in a diary-like format. Blogs often feature a series of posts that can include text, images, and videos, making them highly personal and engaging.

Contrasting with this, corporate websites typically focus on representing a business, providing information about products or services, and facilitating customer engagement or transactions. Email websites are platforms for managing electronic mail and do not accommodate personal expression in the same way. Governmental websites aim to provide information and services related to government functions and policies rather than personal content. Thus, the characteristics of a blog clearly align with the description of a digital diary, making it the correct choice.