The Crusades
These were a series of military campaigns by western Europe Christians in the high middle ages. the purpose was to liberate the holy land from Muslim occupation and rule.
Answer:
b) sensory adaptation.
Explanation:
Sensory adaptation: It refers to the process that signifies the change in the sensory receptor's sensitivity occurs concerning the stimulus relation. All senses that are present tend to experience sensory adaptation. The sensory adaptation reduces the tendency of a person's awareness towards a constant stimulus.
In the question above, the change in Carlos's reaction to the volume of the music illustrates the phenomenon of sensory adaptation.
1871. Hope this was helpful :-)