Some people are born with a predisposition (e. g., genotype) for schizophrenia, but do not show symptoms of the disease until they have experienced a disruption in their lives or environment. this is most consistent with the model of psychological disorders.

This is most consistent with the "Diathesis-stress" model of psychological disorders.

The diathesis– stress model is a psychological theory that endeavors to clarify a confusion as the aftereffect of a cooperation between a predispositional powerlessness and a pressure caused by life encounters. Momentum inquire about suggests that schizophrenia is caused by a hereditary powerlessness combined with ecological and psychosocial stressors, the supposed diathesis-stress model. Family thinks about recommend that individuals have shifting levels of acquired hereditary weakness, from low to high, to schizophrenia. 

It is c commensalism

Geography affect the locations of economic activities by the following factors -transport government policies labour market