The kilogram (kg) is a measurement of which quantities?

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

Invasive species are one of the major threats to biodiversity. these species multiply quickly and compete with native species for food, sunlight, spac and other resources. on the map, determine the area where native species will have limited resources available to them due to invasion threat from invasive species threat very low low medium high very high

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?