<span>Preservation of French culture.</span>
The Amazon River is the world's longest river, measuring 6 992 km.
D. rift valleys.
Trenches occur at convergent oceanic plates; fossils are extremely old bones, bodies, or footprints, which have gotten so old the intervening years have turned them into rock; U-shaped valleys are valleys which are shaped like the letter U, and are usually formed by glaciers, which tend not to occur underwater very often.
The Rocky Mountains. They are also the second longest mountain range in the world.
