Identify the role of oxygen in photosynthesis

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last

I’m stuck on this question cuz i’m stupid sksksksk

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.