questions Moving warily, he scrambled back down the slope of the roof on his hands and knees past the line of demarcation where the fresh green Bird shingles gave way to the section of roof he had just finished clearing. He came to the edge on the left of the wasps' nest he had uncovered and moved gingerly toward it, ready to backtrack and bolt down his ladder to the ground if things looked too hot. Question 1: What’s the meaning of ‘past the line of demarcation where the fresh green Bird shingles gave way to the section of roof he had just finished clearing?’ Question 2: What’s the meaning of ‘things looked too hot?’