Which of the following is not a characteristic of life?

The ability to move is not a characteristic of life

Hope this helps! :)

a, i am pretty sure.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.