TASK DEFINITION: In this task, you are given a sentence in the Spanish language. Your task is to translate the Spanish sentence into the English language.
PROBLEM: ¿Para qué sirve la técnica de la flecha descendente en la terapia cognitiva de la depresión?

SOLUTION: What is the use of the descending arrow technique in the cognitive therapy of depression?

PROBLEM: ¿Cómo se llama la parte del antígeno que es reconocida por el anticuerpo?

SOLUTION: What is the part of the antigen that is recognized by the antibody called ?

PROBLEM: ¿Cuál de los nucleófilos relacionados a continuación, presenta una mayor reactividad frente a la reacción de sustitución nucleofílica bimolecular?

SOLUTION:
Which of the nucleophiles listed below has a greater reactivity to the bimolecular nucleophilic substitution reaction?