3) one of the earliest observation studies from the 18th century was the relationship between \nomega 3…
3) one of the earliest observation studies from the 18th century was the relationship between \nomega 3 fatty acids and heart disease\nvitamin c and scurvy\ncalcium and osteoporosis\nsunlight and skin cancer
Answer
Brief Explanations:
In the 18th - century, sailors were known to develop scurvy, and it was observed that vitamin - C rich foods could prevent it. The relationship between vitamin C and scurvy was one of the early observational studies. Omega - 3 fatty acids and heart disease research is more modern. Calcium and osteoporosis research also developed later. The link between sunlight and skin cancer is a more contemporary discovery.
Answer:
Vitamin C and scurvy