Task: Question Answering
Input (English): Context: A sclerite (Greek , ', meaning "hard") is a hardened body part. In various branches of biology the term is applied to various structures, but not as a rule to vertebrate anatomical features such as bones and teeth. Instead it refers most commonly to the hardened parts of arthropod exoskeletons and the internal spicules of invertebrates such as certain sponges and soft corals. In paleontology, a scleritome is the complete set of sclerites of an organism, often all that is known from fossil invertebrates., The Coelosclerithophorans are a polyphyletic group of organisms bearing hollow sclerites made of aragonite , and with an allegedly distinctive microstructure . Their skeletons may be homologous to those of the molluscs , and Halkieria looks very much like a polyplacophoran . The shells of this group and the molluscs appear to have originated in the same fashion . However , there are several reasons to doubt this relationship , many of which may not pass muster . There are two groups within the coeloscleritophorans : the Sachitids , to which Halkieria and Wiwaxia belong , and the Chancellorids . The Ediacaran fossil Ausia has been touted as an ancestral ' intermediate ' between both of these groups . These are common constituents of Lower Cambrian small shelly fossil assemblages ., Aragonite is a carbonate mineral, one of the two most common, naturally occurring, crystal forms of calcium carbonate, CaCO (the other form being the mineral calcite). It is formed by biological and physical processes, including precipitation from marine and freshwater environments., Aragon (or , Spanish and , or ) is an autonomous community in Spain, coextensive with the medieval Kingdom of Aragon. Located in northeastern Spain, the Aragonese autonomous community comprises three provinces (from north to south): Huesca, Zaragoza, and Teruel. Its capital is Zaragoza (also called "Saragossa" in English). The current Statute of Autonomy declares Aragon a "nationality" of Spain., An exoskeleton (from Greek , "éx" "outer" and , "skeletos" "skeleton") is the external skeleton that supports and protects an animal's body, in contrast to the internal skeleton (endoskeleton) of, for example, a human. In usage, some of the larger kinds of exoskeletons are known as "shells". Examples of animals with exoskeletons include insects such as grasshoppers and cockroaches, and crustaceans such as crabs and lobsters. The shells of certain sponges and the various groups of shelled molluscs, including those of snails, clams, tusk shells, chitons and nautilus, are also exoskeletons. Some animals, such as the tortoise, have both an endoskeleton and an exoskeleton., Subject: coeloscleritophoran, Relation: parent_taxon, Options: (A) animal (B) saragossa
Output (English): animal