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The area of focus that is likely to have the greatest impact is: Tobacco use prevention.

Tobacco is a substance which major ingredient or chemical is nicotine. This nicotine are harmful to the body when inhale or consume.

Tobacco smoking is one of the major cause of premature death as smokers are liable to die to young.

Tobacco use prevention is likely to have the greatest impact when addressing the preventable cause of premature death.

Based on this  preventive measure should be put in place so as to reduce the rate of premature death cause by tobacco smoking.

Preventing or prohibiting people from using tobacco and helping those addicted to smoking to quits is one of the prevent measure that should be put place.

Inconclusion the area of focus that is likely to have the greatest impact is: Tobacco use prevention.

Learn more here: https://brainly.com/question/17494303