Answer:
The most vital function of Earth's magnetic field is to deflect most of the solar winds. The solar winds are dangerous level of radiation, that would kills us without our magnetic field.
Your answer would be Tectonic.
Tectonic plates move in various directions, and move slowly. Due to the movement of tectonic plates the earth cracks, and shakes which is called an earch quake. Tectonic plates move constently everyday, and you can't feel it because it's slow. Wehn tectonic plates move quickly, the earth starts to shake. The most common places that have tectonic plates have a higher chance of having an earthquake, even a tusnami.
Lapita people and Polynesians were considered nomads before,
meaning no permanent settlement. These
people searched for places suitable for the type of living that they have. For example, that who settled in farmlands
and have animals to raise finds places suitable for farming. Others go near the
sea or rivers in order to go fishing.
