What is indicated by the EU regulation 2015/1998 in relation to Ryanair's policies?

The reference to EU regulation 2015/1998 specifically pertains to aviation security requirements. This regulation is integral in defining the security procedures that must be adhered to by airlines operating within the European Union, including Ryanair. It encompasses various aspects of airline security, ensuring that measures are in place to protect passengers and the aircraft from potential threats.

The regulation outlines specific security screening protocols, access control measures, and the responsibilities of personnel in maintaining a secure environment at airports. Therefore, it aligns seamlessly with Ryanair's policies regarding the safeguarding of its operations and its passengers during travel.

The other options do not capture the essence of this regulation accurately, as it does not directly address aspects such as passenger comfort, flight improvements, or the broader business operations of the airline. Instead, its focused aim is on establishing and enforcing a robust framework for security in aviation.