Answer and Explanation:
1. The context clues allow the reader to understand that the animals were being taken in something long, narrow and straight, which stretched along the horizon, as it was many kilometers long.
2. This helps readers understand that hamburgers come from beef and that these animals must be slaughtered for the hamburger to be made. This slaughter is carried out by taking the animals on a concrete chute where they are taken one by one to be killed.