Based on this website I would say B. Hope this helps
PH + PoH is equal to 14.
You’re given the concentration of OH. Taking the logarithm of that (log [OH]) gives you PoH. Subtract 14 from answer to get PH. Hope that helps :-)
Luminosity represent the star's lifetime because it shows how bright they are. does that help?
Answer: Intrusive rock also called plutonic rock. They are formed from magma forced into older rocks at depths within the earths crust.
Explanation: