Answer:
D. presidential democracy
Explanation:
There are 50 states in the United States of America. But if you were asking for the whole entire world , right now there is probably around 300 states in the whole world, I think.
Biological psychology means the scientific study of the biological bases of behavior and emotional processes.
<h3>What is a
Biological psychology?</h3>
This is a branch of psychology that studies the relationship between psychological processes and the underlying physiological events.
Hence, its means the scientific study of the biological bases of behavior and emotional processes.
Therefore, the Option D is correct.
Read more about Biological psychology
<em>brainly.com/question/9997098</em>
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I personally think the answer is a