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B
Virology
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C
Pedalogy
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D
Mycology
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Solution
The correct option is A Dirology
The science of extinction is called dirology. An endangered species is defined as a population of a living species that is in danger of becoming extinct because of several reasons.
Some of the reasons can be the species have a very low population or they are threatened by the varying environmental or prepositional parameters. Therefore, the correct answer is option A.