According to the research, the correct option is a. Circulation of blood is an example of a nonconscious process.
It consists of the exit of blood from the heart through the arteries, its distribution throughout the body (to provide the cells with the substances necessary for their normal functioning) and its return to the heart through the veins.
It is linked to nonconscious processes since blood circulation is a physiological function inaccessible to conscious awareness of humans and most metazoan animals.
Therefore, we can conclude that according to the research, the correct option is a. Circulation of blood is an example of a nonconscious process.
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