Which of the following shows an unsaturated fatty acid?
(see attachment for choices)

The correct option among all the options that are given in the attachment is the second option or option "B". This diagram actually shows the correct picture of an unsaturated fatty acid. I hope that this is the answer that you were looking for and the answer has actually come to your desired help.

And a) oxygen i believe

Okay well gravitational energy is matter forced by gravity making energy though the kinetic energy then the electric energy produces electricity from the kinetic energy and the kinetic energy gets its energy from the gravitational energy. was that the answer you wanted or something else?