9. The loss of the ability to communicate verbally or in writing is known as
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Answer:
b. phenotypic variation of a trait in a particular population.
Explanation:
Heritability describes a statistical measure that indicates variation in phenotypes (traits present) in a particular population.
An estimate of heritability of a trait is specific to a studied population in a determined environment, and it could change over time as circumstances often change. Heritability estimates range in a scale from zero to one.
Factors leading to this will be both ambient, and genetical. The case below exemplifies envirnoment impact.See below for a clearer view:
