c.) An essence is a physical entity that is the building block of every
object in the universe.
Explanation:
The central epistemological tenet of Plato's doctrine of the Forms deals basically about how the physical world is not really the 'real' world; but rather the ultimate reality exists beyond our physical world, which according to him is the Spiritual Realm
Thus, Platonic epistemology asserts that knowledge of Platonic Ideas is not physical, but innate, such that learning is the development of ideas buried deep in the soul.
Hence, the correct answer is "An essence is a physical entity that is the building block of every object in the universe."
Railroads were used all across the U.S for long journeys. Ships were used for trans-Atlantic voyages. These voyages were safe due to pirates and bandits dying out during the 1830s.
The end of the European Renaissance is usually considered the beginning of the "Early Modern Period", which was an especially fruitful time since it contained the Age of Exploration and Enlightenment.