Can someone help me if your kind enough

A.) pure gold

Explanation:

1 mL = 1 cm^3

D = m / v

D = 772 g / 40 mL

D = 19.30 g / mL

On the chart, materials with a density of 19.30 is gold therefore the answer is A.) pure gold

loess contribute to the flooding of rivers by providing the silt that is washed into rivers and constantly raises the bed of the rivers. this elevation above the surrounding flood plains and dams allow the river to overwhelm the dams and flood thousand of square miles of neighboring flood plains.