Help I absolutely pressed commensalism, please help me with number 10, please be sure of your answer, the first one to answer gets brainliest!​

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

What type of reaction fuels the processes seen here?

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?