Neuroscientists who surgically remove, destroy, or eliminate the brain tissue of laboratory animals are using which of the following techniques for studying the brain?

a. electroencephalogram (eeg)
b. positron emission tomography (pet)
c. magnetic resonance imaging (mri)
d. brain lesioning

Neuro scientists uses brain lesioning  for studying the brain.

Explanation:

When damage occur in a small area of brain,is called as lesions.The role of lesion is to control the movement of target cell and this is used to treat the movement of these disorders.This type of treatment is usually not prefer by doctor as it may create problems and are rarely used. Some movement disorders are not cured by lesioning but it can help at certain point. This type of treatment may create many risks like-speech problem, cognitive problems, galt problems,vision problems, numbness etc

Yes, take risk in life

The first means of speeding up reactions mentioned by the speaker is raising the enzymes