Which of the following statements is true? a) frost-wedging happens when water freezes andbreaks rocks. b) seafloor spreading is caused by seismic waves. c) earthquakes are both destructive and constructive. d) hydraulic action and abrasion are the main ways particles are transported by wind.

The answer would be: a) Frost-wedging happens when water freezes and breaks rocks.

Normally, the volume of a substance will become lower when the temperature drops but when water becomes ice it will expand. Water that freezes into ice can produce a high pressure from the expansion of their volume. If enough water fills a joint in a rock, the rock might get enough force to fractured or break. This will happens in the area that has a freeze-thaw cycle like in the polar climate.