Bc people developed a fear of them and more tasty stuff started appearing everywhere
I believe the answer is Barbed Wire.
Befor the inventions of barbed wire, the Cattles are let to roam freely across the plains and the owners are required to pay a lot of cowboys to supervise them so they didn't go missing. Witht he invention of barbed wire, they can keep the cattle in a secure place without supervision.
He traveled to the magnetic North Pole and was the first to discover the Northwest Passage from the Atlantic Ocean to the Pacific Ocean. This passage had been searched for over many centuries. Roald's ability to navigate and survive this trip was a great accomplishment.
Explanation:
Answer:
The navigational tools provided were inaccurate, Financial risks, and the explorers only had limited knowledge of the geography of the world, so the possibility of them getting lost was high.