Question

put the stages of the life span of the sun in order. nebula: red giant: protostar: white dwarf: main sequence:

Explanation:

The Sun forms from a collapsing cloud of gas and dust called a nebula. This collapsing core becomes a protostar, which heats up until nuclear fusion starts, entering the long main sequence phase. When hydrogen in its core is exhausted, it expands into a red giant. Finally, the core collapses into a white dwarf as the outer layers are ejected.

Answer:

nebula: 1
protostar: 2
main sequence: 3
red giant: 4
white dwarf: 5