Answer:
The answer is O Cool air is sinking.
Blood urea nitrogen (BUN) and creatinine tests can be used together to find the BUN-to-creatinine ratio (BUN:creatinine). A BUN-to-creatinine ratio can help your doctor check for problems, such as dehydration, that may cause abnormal BUN and creatinine levels.
Protection important government rights factor
Answer:
D
Explanation:
i think it is wider and interesting
Answer:
crops die or taste bad and runoff into the ocean