What are seven easily observable characteristics of all living things

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

If animal agriculture was eliminated, how much grain would become available for human consumption?

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.