Because water expands when it freezes, rock can be broken when water freezes in cracks in rocks.
(water; expands; T:when it freezes, rock can be broken) (water; freezes; L:in cracks in rocks) (it; freezes; rock can be broken when water freezes in cracks in rocks) Context(it freezes,List([27, 37))):(rock; can be broken; T:when water freezes in cracks in rocks)
it freezes,List([27, 37))
water water it rock
expands freezes freezes can be broken
T:when it freezes, rock can be broken
L:in cracks in rocks
rock can be broken when water freezes in cracks in rocks
T:when water freezes in cracks in rocks