What type of attack aims to make an application unavailable?

The correct choice is Denial of Service, which refers to an attack intended to disrupt the normal functioning of a targeted server, service, or network by overwhelming it with a flood of illegitimate requests. This flood of traffic can significantly degrade the performance of the application or cause it to become completely unavailable, preventing legitimate users from accessing the service.

In the context of cloud security and application management, understanding denial of service attacks is crucial for implementing the right protective measures, such as resource scaling, rate limiting, and the use of intrusion detection systems to identify and mitigate these attacks before they can render an application unusable. This type of attack exemplifies the need to ensure continuity of service and maintain uptime in cloud environments.

The other options relate to different concepts: data seizure involves unlawfully taking possession of data, degaussing refers to erasing data from magnetic media, and Database as a Service is a cloud service model that allows users to access and manage databases without dealing with physical hardware, but none of these directly pertain to making an application unavailable in the same way that a denial of service attack does.