Answer: observational study
Explanation:
The observational studies are those studies where the researchers observes the samples or individuals of research without any intervention or manipulation.
In epidemiology, and nutritional studies the researcher observes the risk factors associated with the disease, diagnosis and treatment. The effect of a diet on the patient or volunteers can be done through observational studies.
Explanation:
Decrease level of calcium in the blood is the correct answer
false. because they can become strained
Your academic pad in college is the furred to as a major.