They form when continents collide; this boundary is a convergent / collision
Answer:
It depends on what your looking for metals? Non-metals? metaloids? or gas welp either way the most reactant for all of them are metal: Caesium Non-metal: Fluorine and gas: Hydrogen lastly metaloids: Francium, although some say that doesn't count so it would be Caesium.
Explanation:
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Natural springs are not a means of water erosion. Some types of water erosion include rain, streams, rivers, and ocean waves.</span>