Read the following passage and answer the question by choosing among the four alternatives given:
In the distant land of Euphoria, a realm shrouded in magic and mystery, a prophecy has long foretold the arrival of a chosen hero. According to ancient lore, this hero possesses extraordinary powers and is destined to save the kingdom from impending doom. The prophecy speaks of a perilous quest that the hero must undertake, facing formidable challenges and overcoming insurmountable odds. Legends whisper of a hidden artifact, known as the Crystal of Enlightenment, which holds the key to unlocking the hero's true potential. It is said that the Crystal is guarded by mythical creatures and hidden deep within the treacherous Abyssal Caverns. Many have sought the Crystal, but none have returned. The fate of Euphoria hangs in the balance as the kingdom eagerly awaits the emergence of the chosen hero, the one who will bring light to the encroaching darkness.
What is the main objective of the chosen hero in the prophecy?