The answer is : Tar
Tar is some sort of residual substance that we commonly found in tobacco products, which could cause the symptoms you've mentioned above
not only that, Tar is a highly carcinogenic substance, which mean that it generate high risk of cancer it get into our system
Science has shown that smoking causes cancer. Among these is an example
of how society responded to this information. Which one is this?
B. Forty-seven U.S. states now restrict smoking in public areas.
Food certainly foods they eat
Answer:
Epidemiological.
Explanation:
Epidemiological study may be defined as the type of study that includes the different group of the human population to understand the factors that might affects the health.
This study also explains the risk of a particular factor in the population. In the given question, the study is done to understand the relationship between the delayed physical growth and low-income. This clearly explains the epidemological study and this study also have proper design to study the population in cohort.
Thus, the answer is epidemiological.