Apsychologist working from the biological perspective would study all of the following to see how they affect behavior and cognitive processes except a. attention b. brain cells c. genes d. the nervous system

Attention.

Explanation:

When a psychologist is working from the biological perspective then he should not consider attention as a factor because it is not a biological factor it is a psychological factor.

The factors like brain cells, genes and nervous system can be considered as the biological factors that can be used to determine the effect of brain cells, genes and nervous system on the cognitive process and behavior.

Hence, the correct answer is option A

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