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Answer:
A: focusing on a single thought
Explanation:
Meditation is a mental exercise that helps to train the mind for good attention and awareness. It entails the practice of focusing one's mind on a thought or activity to achieve a calm, stable state.
Answer: Determinants of health events: (the how and why): factors and exposures, characteristics, behaviors, and contexts that determine (or influence) the patterns: individuals, relational, social, etc.
Explanation: Epidemiologists investigate determinants of health events. How the disease came into existence, the factors affecting it transmission (both biotic and abiotic). Characters of the causative organisms and vector. The effects of disease on individuals (pathology), its distribution, and control.