Answer:
Hotter than the upper mantle
Explanation:
The lower mantle temperature, in contrast, reaches over 7,230 degrees Fahrenheit or 4,000 degrees Celsius. Pressure is one great difference between the upper and lower mantle. The viscosity of the upper mantle is greater than the viscosity of the lower mantle. This is because there is less pressure at the upper mantle.
Answer:
Im gonna say the answer is hotter than the upper mantle
Explanation:
I say this bc I use process of elimination I know for a fact its not B or C so its out of A or D and I dont think A is correct so imma go with D
