The main cause of a very bad health condition of people globally is Poverty, Smoking, Sanitation and Cardiovascular Disease.
Several studies show that the relationship between health and poverty is possibly bi-causal, since a low level of income causes poor health, which, in turn, tends to cause a low level of income, creating a vicious circle known as the so-called health-poverty trap.
Smoking is a disease (nicotine dependence) that is related to approximately 50 diseases, including several types of cancer (lung, larynx, pharynx, esophagus, stomach, pancreas, liver, kidney, bladder, cervix, leukemia), respiratory system diseases
Contact with sewage and consumption of untreated water are linked to high infant mortality rates. The main causes are diseases such as parasitosis, diarrhea, typhoid fever and leptospirosis.
Cardiovascular diseases consist of pathologies that affect the circulatory system, that is, the heart and blood vessels. These are problems that cause serious complications, such as infarction, arrhythmia, stroke, heart failure and other changes.
With this information, we can conclude that all alternatives are correct.
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