Answer: B. Slower population growth
Explanation:
Slower population growth is Not a reason why communicable diseases like pneumonia kill fewer people today than they did in the past, this is because in present times irrespective of the population growth, newer approaches have been introduced to improve quality of life and hence reduce the risk of communicable diseases.
Approaches like; continuing medical advances, improved living conditions, better preventive treatment. Etc.
You can catch the flu, but HIV you can't if its inactive, but you can catch the flu if it still active
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Opiates, a class of drug.
The consequences of your decisions can affect your emotional and self esteem health.