Answer:
Explanation:
The chemical imbalance theory is unproven and often cited as an explanation for mental health conditions. It states that these conditions are caused by an imbalance of neurotransmitters between nerve cells in the brain. For example, depression is said to be a result of having too little serotonin in the brain.
The species can no longer survive in those conditions and become extinct.
Postural tremor occurs when a body part is placed in a particular position and is required to maintain that position for a period of time.
