Polyp
It is a kind of eel that attaches to fish.
It will form an igneous rock
an island
This is described as a normal fault.
Fixed
A flat surface?
through volcanoes, lava comes out and when it cools it turns into igneous rock.
through volcanoes, lava comes out and when it cools it turns into igneous rock.
a flat surface.
A tool with which one grates, rasps, planes, or shaves material, especially wood, to form its surface; A kind of tool that cuts by means of perforated steel holes with sharp rims
Hard surface
hard surface