The composition of a star is abundant in hydrogen and helium, both of which are two of the lightest elements. Because they are very light, they are usually unstable. To becomes stable, hydrogen atoms spontaneously combine with each other through a radiation process called nuclear fusion, to yield helium atoms. This process requires very high energy in the form of heat. Therefore, these lighter elements are burned in order to keep the star alive with energy.
Therefore, the answer is D.
H, G, E, F, And A
Hope that helped sorry if it’s wrong
<span>physical agents are mechanical forces that produce injury or tissue trauma. some examples of this are extremes of temperature (burns and really deep cold), sudden changes in atmospheric pressure, radiation, and electric shock.</span>
Look up the definition and then revise it
The answer is Interspecific competition.
