What is the primary function of a monosacchride in the human body

Energy. The monosaccharide is the simplest form of sugar that cannot be further hydrolyzed. They are also the most basic unit of carbohydrates.

Energy is your answer.

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle

2%? i tried finding the exact sorry if it's not 100% correct ; -;