Singing Christmas Tree bass and heavier singers at the bottom of the tree. In reality, they are arranged in six sections. They are broken down with two sections of sopranos, two sections of altos, a section of tenors, and a section of bass. Singers who require sitting in a chair or a stool during the performance are located in the bottom two rows of the tree. Choir members who are acrophobic (fear of heights) are located near the bottom of the tree while claustrophobic (fear of restriction or suffocation) choir members are located at the outside of the tree. Most choir members stand
Fear rats in two different shock situations responded differently, based on instinct or defensive topography, rather than contextual information. Species-specific defense responses are created out of fear, and are essential for survival. Rats that lack the gene stathmin show no avoidance learning, or a lack of fear, and will often walk directly up to cats and be eaten. Animals use these SSDRs to continue living, to help increase their chance of fitness, by surviving long enough to procreate. Humans and animals alike have created fear to know what should be avoided, and this fear can be learned through association with others