<em>Answer is B. The fossils in the lower layers are older than the fossils in the upper layers.</em>
If I am understanding the choices correctly, the answer would be Convection Currents.
Hope this helps!
They can make food, help keep the environment clean, and make medicines.
Answer:
Yes, future exploration to the poles important for humans.
Explanation:
This is important we need to know more about what is going on in the poles. Reason one is because we have no clue what could be living there and how it is living There in the cold places it. Second That could also help with global warming and I say this because some testing could be done to see what we could do to stop it or at least slow it down. Last but not least they can also find new animals just like how there is more animal or fishes the live in the sea. This would help us learn what is beyond what we look for. In conclusion, there is more to learn at the poles and every where else.
Answer:
B) The normal pH of blood is 6.8 to 7.0.
Explanation:
The blood pH under normal health conditions is between 7.35 and 7.45. Below this range, blood pH is considered more acidic than normal, and it may indicate that the body is eliminating a lower amount of 
than normal, or that there is a decrease in the concentration of 
or accumulation of acid in the blood due to poisoning or disease.
