In most stars, like our sun, hydrogen is being converted into helium, a process which gives off energy that heats the star.
(hydrogen; is being converted; into helium; L:In most stars) (a process; gives off; energy that heats the star) (energy; heats; the star)
hydrogen a process energy
is being converted gives off heats
into helium L:In most stars
energy that heats the star
the star