Coal is formed when peat is altered physically and chemically. This process is called coalification.. During coalification, peat undergoes several changes as a result of bacterial decay, compaction, heat, and time.
On January 9, 2011, ABC Family announced the show would return for its fourth season on March 26, 2011. On February 2, 2012, ABC Family renewed the series for a fifth season. On October 9, 2012, it was announced that the fifth season of The Secret Life of the American Teenager would be the final season. The series finale aired on June 3, 2013.
Cierra was cast as Kathy, a recurring character, in The Secret Life of the American Teenager that makes her first appearance in the 100th episode. She also stars Girl in Progress, portraying one of the lead roles, Ansiedad, for which she won an ALMA Award for Favorite Movie Actress Supporting Role.