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Final answer:Astereotaxic instrumentis a medical device mainly used for performing precise surgeries in the brain, especially in animals, by locating specific points within the brain's three-dimensional space.Explanation:A stereotaxic instrument is a device commonly used in neurological research and neurosurgery. It is a method used to locate specific points within thethree-dimensional spaceof the brain. This precise manipulation is especially helpful in animals and thus, the correct answer to your question would be option A) brain surgery in an animal.It's crucial in procedures that require the accurate placement of electrodes or other surgical tools within various brain structures. Assessing blood flow, measuring heart rate or looking forabnormal brainstructures in a human are tasks better suited to other medical technologies and diagnostic tools.Learn more about Stereotaxic instrument here:brainly.com/question/31763869#SPJ11...