Read the introduction (paragraphs 1-5). What does this section explain that other
sections do NOT?
А
a description of which elements can be
affected when nuclear fusion occurs inside a
star
B
a comparison between the amount of
energy inside a star and the amount used to
power a city
С
an explanation of the elements that cause
stars to heat and collapse during nuclear
fusion
D
a series of events that triggered the creation
of our solar system millions of years ago