Final answer:
Formally joining FCCLA starts with completing an application, followed by paying membership dues. Attending meetings and participating in service projects are parts of active membership but are not requirements for joining.
Step-by-step explanation:
The process of formally joining FCCLA (Family, Career and Community Leaders of America) involves several steps, but among the choices provided, completing an application is usually the first formal step in the membership process. After the application is completed, a student typically must pay membership dues, which is the next step in solidifying membership. Participating in meetings and service projects are important components of being an active member, but these are generally not formal requirements for joining.