The stages below are not in the right order. Number the stages in the correct order. The star begins to run out of fuel and expands into a red giant or red supergiant.
Stars start out as diffused clouds of gas and dust drifting through space. A single one of these clouds is called a nebula
What happens next depends on the mass of the star.
Heat and pressure build in the core of the protostar until nuclear fusion takes place.
The force of gravity pulls a nebula together forming clumps called protostars.
Hydrogen atoms are fused together generating an enormous amount of energy igniting the star causing it to shine.

Inelastic is the answer your looking for.

Ithink it's  c. i'm sure 

Jenny and fred both play a long note on their trombones. a stationary observer hears the sound increasing and decreasing repeatedly in loudness. which of these must be true? the sound waves from the two trombones have slightly different frequencies.the sound waves from the two trombones have the same frequency.the sound waves from the two trombones have slightly different amplitudes.the sound waves from the two trombones have the same wavelength.the sound waves from the two trombones have slightly different velocities.  lolthe answer is          the sound waves from the two trombones have slightly different frequencies.