What agent of erosion contributes to the formation of sand dunes? a. animals b. plants
c. water d. wind​

d. wind

Explanation:

The movement of wind upon sand causes it move along with it and when the sand stops at a place it forms sand dunes.

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

is this for the e2020 class