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Synnecrosis is a rare type of symbiosis in which the interaction between species is detrimental to both organisms involved. It is a short-lived condition, as the interaction eventually causes death. Because of this, evolution selects against synnecrosis and it is uncommon in nature. An example of this is the relationship between some species of bees and victims of the bee sting. Species of bees who die after stinging their prey inflict pain on themselves (albeit to protect the hive) as well as on the victim. This term is rarely used.

Why do bees sting even though it will kill them?
Answer: to protect the hive
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Several South Slavic languages are spoken by millions of people in Southern Europe. Serbian is spoken in Serbia, Bosnia, and Croatia; Bulgarian is spoken in Bulgaria; Croatian is spoken in Croatia and Bosnia; Bosnian is spoken in Bosnia; Slovene is spoken in Slovenia; and Macedonian is spoken in Macedonia.

What do people speak in Bulgaria?
Answer: Bulgarian
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In process known as the Marian reforms, Roman consul Gaius Marius carried out a programme of reform of the Roman military. In 107 BC, all citizens, regardless of their wealth or social class, were made eligible for entry into the Roman army. This move formalised and concluded a gradual process that had been growing for centuries, of removing property requirements for military service. The distinction between the three heavy infantry classes, which had already become blurred, had collapsed into a single class of heavy legionary infantry. The heavy infantry legionaries were drawn from citizen stock, while non-citizens came to dominate the ranks of the light infantry. The army's higher-level officers and commanders were still drawn exclusively from the Roman aristocracy.

Who would likely make up the majority of the Roman army's light infantry?
Answer:
non-citizens