Earth is mostly made of rock.
the person that helps out others even his/her enemy when in need is regarded as a good person.
Natural bridge<span>, </span><span>also called </span>natural arch<span>, naturally created </span>arch formation resembling a bridge. <span>Most </span>natural bridges<span> are </span>erosion<span> features that occur in massive, horizontally bedded sandstone or </span><span>limestone</span>M<span>ay be produced by entrenched rivers eroding through </span>meander<span> necks to form cutoffs. Still others are produced by exfoliation and may be enlarged by wind erosion. </span>
They're a shallow ocean habitat, filled with sea life and made of thin layers of calcium carbonate.
