What is the topic sentence.
¹Wuthering Heights is in the midst of the desolate English moors. ²Outside the gates of this solitary dwelling the landscape expands into dreary shades of brown and gray, with only the craggy cliffs on the distant horizon to break the monotony. ³Wildlife and foliage are scarce. ⁴The few trees that do live must eke out their existence: the north wind blows constantly. ⁵The house itself, built to withstand the tumults of wind and rain, is cold and forbidding. ⁶The stone walls and earthen floors offer no relief from the bone-chilling dampness of northern England. ⁷In sharp contrast to Wuthering Heights is Thrushcross Grange. ⁸Situated in a sheltered valley, Thrushcross Grange is calm and peaceful, and is surrounded by lush flower gardens. ⁹The refined elegance of Thrushcross Grange differs as much from Wuthering Heights as the rose differs from the thorn. ¹⁰The contrast between these two settings is symbolic of the ultimate conflicts in Emily Bronte's novel Wuthering Heights.