Compared with participants listening to unstructured beat sequences, individuals listening to rhythmic drumming show enhanced wave activity.

Theta wave activity

Explanation: Theta waves are brain waves with a frequency 3 to 8 Hz which occur most often during sleep. They are also quite prominent in deep meditation and in situations where individuals listen to rhythmic drumming (such as shamanic activities and so on). Theta waves have been shown to enhance learning, memory, and intuition; allowing both the body and mind to experience enhanced rejuvenation, growth, and healing due to the deep level of relaxation they induce.

they all focused on themes about the inevitability of death.

a.indigo and cochineal

b.animal hides

c.silver and gold

e.cacao beans and sugarcane