Task: Question Answering
Input (English): Question: Which of the following techniques is considered, according to the available evidence, a well-established treatment in the case of childhood phobias: 
 Options:  <1> The training in HHSS. <2> The emotive images. <3> The therapy based on the game. <4> Systematic desensitization through eye movements. <5> The practice reinforced.
Output (English): 5