Final answer:
Rational thinking is one of the self-protective devices used to cope with basic anxiety, according to Horney's theories.
Step-by-step explanation:
According to Horney's theories, one of the self-protective devices used to cope with basic anxiety is rational thinking. Horney suggests that rational thinking helps individuals to manage their anxiety and make reasoned decisions. By using logical and rational thought processes, individuals can gain a sense of control and reduce anxiety.