Question

One of the reasons that stars are so large is because _____.

a.) pressure builds to heat the gases
b.) gravity causes expansion
c.) larger masses are easier to heat than small masses
d.) they are composed of hydrogen and helium

Answer 1

They are composed of hydrogen and helium

Answer 2

Best answer a.) pressure builds to heat the gases

Step-by-step explanation:

A star is made up a massive ball of hot gas, large enough that gravity causes it to implode on itself forming a very dense and hot core that then causes nuclear fusion, whereby larger atoms are formed from the combination of much smaller ones, in the process a lot of heat and pressure is generated that then in turn pushes outwards from the core making it larger.