There aren't enough oxygen molecules in the air are higher altitudes
Answer:
Metamorphic rocks have been put under great pressure, heated, squashed or stretched, and fossils do not usually survive these extreme conditions.
Explanation:
B. 6CO2 + 6H2O ------> C6H12O6 + 6O2
I hope I helped!
This helps them to reproduce much more quickly and without much effort
Number 3 and 4 are the correct answers hope this helped