what is/are the only fuel that can sustain the burning in the sun long enough to sustain life on earth?

Question

a.Fuel and coals
b.Hydrogen and Fuel
c.Nuclear Fusion

Answer 1

Nuclear Fusion - which fuses 4 Hydrogens into a Helium (through a couple of different methods)

Answer 2

The Sun fuses hydrogen atom together to make helium. Nuclear fusion is what powers the Sun. It will continue to "burn" for many more billions of years.
.

Answer 3

hydrogyne and helium

but they are going to run out in 5 billion years so that causes the sun to turn in to a red giant and swallow up the first threee inner plantes and the sun gets close enough to evaporate all of the water on the earth and kill every living thing on the Earth. Sad isnt it?