Almost all personality traits and intellectual characteristics can be traced to the combined influence of , with little left over for the influence of .

- Genes and non-shared environments; shared environments.

Explanation:

Personality traits are demonstrated as the characteristics, qualities, or attributes that define an individual's personality as it discloses the thoughts, emotions, or the behavior of that person.

As per the question, the intellectual features of an individual or his/her personality traits could be displayed as the merged impact or influence of 'genes and non-shared environments' along with the little remaining over the impact of 'shared environments'. The key reason is that the thoughts or behavior of an individual is acquired through the genes of his/her parents that has been transferred to them or non-shared environments which reveals their true thoughts, abilities, or behavior as well as the impact of 'shared environments' also plays a great deal because people learn a lot from the environment they live in like family, school, peer groups, etc. Thus, the combination of both determines the individual traits.

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explanation: