In the diagram below,which highlighted element is an f block element? 
Definitions:
Epidemiological Research
The study of the distribution, patterns, and determinants of health and disease conditions in specified populations.
Situational Factors
External influences that affect an individual's behavior, decision-making process, and performance, which can vary depending on the context or environment.
Volitional
Pertaining to the use of one's will. Often refers to actions taken as a result of one's own choice or decision-making processes.
Compulsory Treatment Orders
Legal orders which require a person with a mental health disorder to undergo treatment or therapy without their consent.
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