Which of the following is true about tectonic plates? * 1. Tectonic plates are solid pieces of the Earth's crust that cannot move or shift.
2. Tectonic plates sometimes cause earthquakes, but they cannot cause tsunamis.
3. Tectonic plates can get stuck until they slam past each other, releasing pressure.
4. Tectonic plates are special instruments used to tell scientists when a tsunami is coming toward land.