Explanation: Class Cephalopoda are highly advanced and organized group of marine animals that have a distinctive characteristics of their head been attached to their body and they possess tentacles that is to say their head is completely merged with their foot with their arms or tentacles surrounding the head.
Their body plan includes the head, two eyes, a mantle, a siphon and a minimum of eight arms. Some examples are octopus, squid and the cuttlefish
Most limestones actually start as calcium carbonate mud or shells precipitated by organisms in reefs or shallow shelf regions - the biosphere. Over time, the limestone is broken down into its chemical parts and may come back to the surface as volcanic CO2 (in the atmosphere).
i think that taking care of the earth important because the earth is where we live and if we do not take care of the earth we wont have a nice place to live
