Jacoby's mother had schizophrenia, and so jacoby was raised by his grandparents. now, at age 22, jacoby is experiencing severe stress due to his new job and his grandfather's unexpected death. he is beginning to display symptoms of schizophrenia. the manifestation of these symptoms is best explained by which of the following developmental concept:

Diathesis-stress model.

Explanation:

Diathesis-stress model may be defined as the psychological theory that are used to explain any disorder or the stress of the individual. Diathesis has been derived fro the greek word that means sensibility.

Jacoby experiences stress that can be measured by the diathesis-stress model. The symptoms of his schizophrenia and its symptoms can be easily diagnosed by the the diathesis-stress model. This model can be used to express the stress of the individual.

Thus, the answer is the diathesis-stress model.