What does it mean for a Development Team to be cross-functional?

The Development Team includes not only developers but also business analysts, architects, and testers.

The Development Team includes cross-skilled individuals who are able to contribute to do what is necessary to deliver an increment of software.

Developers on the Development Team work closely with business analysts, architects, developers and testers who are not on the team.

The Development Team is a virtual team drawing from separate teams of business analysts, architects, developers and testers.