保险里要不要勾subsidence

请教一下:

新家Home report做出来说:
The property has suffered previous movement in the form of sloping to floors and stepped cracking but I saw now evidence to suggest this is on going.
问是是保险里问有没有heave, subsidence, landslide 要不要选? 一选就很贵,这也就算了, 一定要问是几几年的,不然不让买。
我家完全看不出crack。 我相信老房子都有我类似的movement, 那大家都在买保险时选不选?