The possible sequence in the life cycle of a massive star is protostar, main sequence star, red supergiant, nebula, supernova, neutron star or black hole. The correct option is D.
What is a star?
A star is any humongous self celestial body of gas that sparkles from internal energy sources through radiation.
Only a small percentage of the observable universe's tens of billions of trillions of stars are visible to the bare eye.
A massive star's life cycle can be classified as a protostar, main sequence star, red supergiant, nebula, supernova, neutron star, or black hole.
Thus, the correct option is D.
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Your question seems incomplete, the missing options are:
A) nebula, protostar, main sequence star, red giant, white dwarf, neutron star or black hole
B) protostar, nebula, main sequence star, white dwarf, red giant, neutron star or black hole
C) nebula, protostar, main sequence star, red supergiant, supernova, neutron star or black hole
D) protostar, main sequence star, red supergiant, nebula, supernova, neutron star or black hole
