What are three challenges shackleton had to overcame?

Ernest Shackleton faced numerous challenges during his Antarctic expedition, most notably the loss of his ship, the Endurance, which became trapped in pack ice and ultimately sank. He also had to contend with extreme weather conditions, including freezing temperatures and treacherous ice, which posed significant risks to his crew's survival. Additionally, Shackleton had to maintain morale and cohesion among his men during their grueling journey for rescue, as they endured hardship and uncertainty for months.