Number 1, tribalism, is the answer!
The crystal.s grow and put pressur.e on the roc.k, which eventually causes it to brea.k apar.t. Saltwa.ter weatheri.ng is common along coastlines.
They are mid-ocean ridges<span>, which </span>form<span> where two tectonic plates are spreading apart, which is called seafloor spreading. Tectonic plates are large pieces of the earth's crust, and they interact in a number of ways. Where they pull apart is called a divergent plate boundary.</span>
They received annual economic benefit.