Part of Dave’s genotype

Depression is part of Dave’s genotype. Experiencing a recent trauma was enough to trigger his depression and have it manifested as a phenotype (i.e., an official clinical depression diagnosis). This gene-by-environment interaction is an example of…

** Please give me the correct answer with an explanation. Also, provide me the conclusion as well. This is send time i am posting this question. Please provide me the answer, explanation and conclusion as well.