Ascientist who tries to determine how the differences in a particular personality trait are correlated with differences in a particular gene, is using the method

A scientist who tries to determine how the differences in a particular personality trait are correlated with differences in a particular gene, is using the molecular genetics method. Molecular genetics is a variety of research techniques that scientists use to learn about how genes are associated with which personality traits. Molecular genetics deals with the makeup and functions of genetic material at the molecular level.

it's d. aerobic]

a chair, a bed, and a toothbrush

explanation:

i was told this before by a teacher, so yeah