Read the excerpt from mending wall: "something there is that doesn't love a wall, that sends the frozen-ground-swell under it, and spills the upper boulders in the sun; and makes gaps even two can pass abreast. the work of hunters is another thing: i have come after them and made repair where they have left not one stone on a stone, but they would have the rabbit out of hiding, to the yelping dogs. the gaps i mean, no one has seen them made or heard them made, but at spring mending-time we find them there." whom does the speaker blame for the gaps in the wall?

How is the structure of digital field trips to the grand canyon different from that of to herp, or not to herp? digital field trips to the grand canyon uses a cause and effect structure to show how improvements in technology have affected field trips to the grand canyon, while to herp, or not to herp? uses a problem and solution structure to discuss issues with herping and planned and proposed solutions. digital field trips to the grand canyon uses a chronological structure to discuss how field trips to the grand canyon have changed over time and the improvements that have been made, while to herp, or not to herp? uses a cause and effect structure to discuss the human impact on the environment in arizona. digital field trips to the grand canyon uses a compare and contrast structure to show the similarities and differences between digital and physical field trips to the grand canyon, while to herp, or not to herp? uses a chronological structure to show how herping has evolved over time in arizona. digital field trips to the grand canyon uses a problem and solution structure to show how using digital field trips solved the problem of students not being able to physically visit the grand canyon, while to herp, or not to herp? uses a cause and effect structure to discuss the human impact on the environment.