In the wanderings of Odysseus in The Odyssey, which factor proves to be the most challenging to the hero’s cleverness in his attempts to return home to Ithaca?

His confrontation with the Cyclops, who has support from Poseidon, creates such formidable conflict that Odysseus must overcome brute force with deception.
In spite of his well-known sea-faring skills, it is the physical trials of navigating in treacherous seas, including weather, tides, and an unworthy vessel that tests Odysseus the most.
His encounter with Poseidon, who holds a grudge against Odysseus for blinding his son, presents the severest confrontation for the hero.
It was the hero’s trust in Calypso, whom he expected would allow him to return immediately to his wife, Penelope, that becomes the most rigorous obstacle for Odysseus to overcome.

Consider the text from "machu picchu: a city in the sky” and its central idea. informational text: every year, thousands of tourists come to peru to see machu picchu. to reach machu picchu, tourists can hike along the famous inca trail. the trail covers twenty-six miles. it winds through beautiful mountains, forests, and jungle. visitors can also take a bus or train ride up to the ruins. the train takes you past miles of farmland along the urubamba river valley. above are the andes mountains. the tops of the mountains are often covered with mist. then, the train goes up a mountain on a winding road. the road climbs almost 1,640 feet. other incan ruins can be seen beside the road. most are very small compared to the city ahead. central idea: tourists enjoy visiting machu picchu in the mountains of peru. what supporting detail is most important to include in a summary of this text? people can hike the inca trail or take a train or bus to reach machu picchu. when people travel to machu picchu, they see miles of surrounding farms. people are surprised by the mist on the peaks of the andes mountains. when people visit machu picchu, they sometimes see other smaller ruins.