the opening and closing of the pupil in response to light is an involuntary action controlled by the parasympathetic branch of the autonomic nervous system
The correct answer to this open question is the following.
Superimposed boundaries caused ethnic conflict in the Belgian Congo, now present-day, Democratic Republic of Congo because people from the many tribes were forced to live with other people that had different cultural grounds and belief systems.
These superimposed boundaries in Congo force people to mix with other ethnicities and the experiment failed, causing upheaval and conflicts. People started to confront for different reasons: power, control, the use of limited raw materials and natural resources, political positions, and more.
The boundaries were imposed by European superpowers when they colonized this region and ignored the culture, history, customs, and traditions of the tribes.
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