Answer:
A) genetic influences and chemical imbalances in the brain
Explanation:
An anxiety disorder is a psychiatric disorder where the individual experiences an excessive and irrational worry in everyday situations. Generalized anxiety disorder, phobias, panic attacks, etc are examples of anxiety disorders.
<em>Anxiety does not have a specific cause, it can be the result of different factors like changes in the brain's chemistry, environmental stress or even genetics.</em>
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I believe that the areas are tropical and polar zones.
This is the chronicle of evolution over millions of years of geologic time engraved in the order which fossils appear in rock strata.
The answer would be translation :)
Fossils can be used by examine their analogous structures...... give him Brainliest
