Which number doesn't belong? 11-16-4-8-2?

Lost with this question (ap psych) 1. kaylee has a phobia. she is so afraid of spiders and insects that she avoids most outdoor activities and even refuses to go in the basement of her own house alone. provide a reason for her behavior from each of the two perspectives: learning biological/evolutionary 2. cecil is a college student who has ocd. even though his apartment is spotless, he is extremely nervous because his girlfriend is visiting his home for the first time. he is now preoccupied with thoughts that the germs in his apartment will make his girlfriend sick. in order to reduce his anxiety, he is now counting his heartbeats aloud as he washes his hands. provide a reason for his behavior from each of the three perspectives: learning biological/evolutionary psychoanalytical