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'lo scivolo' according to google
Scivolo is slide so not equivalent to chute really although I guess there was some sliding... schianto is more like it.
Crollo can also mean crash but tends to mean more collapse, e.g. the collapse of the Ponte Morandi in Genoa is known as Il crollo del ponte a Genova.
Lo just means the, it's used when words start with an 's' then a consonant (among other things) ;)
'lo scivolo' according to google