The correct answer A
This is in part due to carbon's ability to readily form bonds with other atoms, giving flexibility to the form and function that biomolecules can take, such as DNA and RNA, which are essential for the defining characteristics of life
Slope formula: m = (y2 - y1)/(x2 - x1)
m = (8 - 4)/(7 - 2)
m = 4/5
The slope is 4/5 or 0.8
The four have molecular similarities, but have their own unique traits.