The correct answer is A. Physical characteristic of a trait.
Explanation
The phenotype is a concept used in the area of genetics to refer to the visible physical characteristics of an organism as a result of the manifestation of the genetic information contained in its genotype and the conditions of the determined environment in which the organism lives.
On the other hand, there is the genotype, which is a concept referred to as the abstract set of genetic information contained in the genes of an organism.
According to the above, the correct answer is A.
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