1 where do stars get their energy?\ngravitation\nnuclear fusion\nfriction from the shrinking nebula\nburning…

Brief Explanations:

Stars generate energy through nuclear fusion reactions in their cores, where hydrogen atoms combine to form helium, releasing a vast amount of energy. Gravitation is a force that holds stars together but is not the source of their energy production. Friction from a shrinking nebula is involved in star - formation but not the long - term energy source. Stars do not burn gas and dust in the traditional chemical sense.

Answer:

Nuclear fusion