Complex sentence: My Life My Choice has a board of 14 members with expertise in adolescent development, marketing, legal services, non-profit management, and government who provide guidance and support to the MLMC senior staff.
Split into simpler sentences: My Life My Choice has a board of 14 members who poses knowledge about adolescent development, marketing, legal services, non-profit management, and government. With this knowledge, the board members provide guidance and support to the MLMC senior staff.