Which excerpt of paragraph 2 introduces the idea that the people of Echigo had to learn to live in the snow, rather than try to push or plow it out of the way?

[2] In the province of Echigo, where was my home, winter usually began with a heavy snow which came down fast and steady until only the thick, round ridge-poles of our thatched roofs could be seen. Then groups of laborers, with straw mats over their shoulders and big woven hats that looked like umbrellas, came and with broad wooden shovels cut tunnels through from one side of the street to the other. The snow was not removed from the middle of the street all winter. It lay in a long pile, towering far above the house-tops. The laborers cut steps, for they were carrying snow at intervals all winter, and we children used to climb up and run along the top. We played many games there, sometimes pretending we were knights rescuing a snow-bound village, or fierce brigands stealing upon it for an attack.