The planting of a new nation in America was no holiday undertaking. It meant grim, dirty, toilsome, dangerous work. Here was a great shaggy continent, its eastern third covered with pathless forests; its mountains, rivers, lakes, and rolling plains all upon a huge scale. Its northern stretches were fiercely cold in winter, its southern areas, burning hot in summer. The land was filled with wild beasts and peopled by a warlike, cruel, and treacherous people still in the Stone Age of culture. In many respects it was a forbidding land. It could be reached only by a voyage so dangerous that some ships buried as many as they landed. But despite all its drawbacks, it was admirably fitted to become the home of an energetic, thriving people.

Q. Underline a sentence which uses contrast effectively.