I think it is D
Hope my answer help you?
Answer:
D: the importance of carrying out procedures
Human exploitation of fragile ecosystems can lead to the droughts and arid conditions characteristic of desertification. Effects include land degradation, soil erosion and sterility, and a loss of biodiversity, with huge economic costs for nations where deserts are growing.
The Gallbladder stores bile that is produced in the liver
The answer is dependent variable.
