What is unique about a written resolution?

A written resolution is significant because it serves as a mechanism that allows shareholders to make decisions without the need to convene a formal meeting. This process requires that all eligible shareholders agree to the resolution and provide their signatures, effectively substituting for the traditional meeting format. This flexibility can lead to efficiency in decision-making, especially when swift action is necessary or when logistical difficulties hinder the scheduling of a physical meeting.

The other options do not accurately reflect the nature of written resolutions. While it's true that some resolutions require the agreement of shareholders, the essence of a written resolution lies in its ability to bypass the meeting entirely through signed consent. Additionally, written resolutions are not limited to any specific action, such as director removals, and do not have to be validated by prior discussion in a meeting, which further emphasizes their utility and unique characteristics.