An association between populations that eat more fish and a lower mortality rate from coronary heart disease in the same population would establish which of the following:
a. a group association that may be in generating a hypothesis about the relationship between fish consumption and coronary heart disease.
b. an individual association establishing that eating fish is associated with coronary artery disease.
c. a cause and effect relationship between fish consumption and coronary heart disease.
d. none of these are correct.

A group association that may be helpful in generating a hypothesis about the relationship between fish consumption and coronary heart disease.

Explanation:

The scientific hypothesis explains about the reason and explanation of the particular phenomena. The hypothesis is mainly based on the environmental observations of the scientist.

While explaining the hypothesis about the particular relationship between two things, at least some group association is required. The group association is helpful in the observation and effect of the relationship between the individual. The fish consumption and coronary heart disease must be a group association for the hypothesis development.

Thus, the correct answer is option (A).

b) the heart is a pump made of muscle and that is difficult to grow in the lab.