Question

after a large star burns through most of its hydrogen, it expands and becomes a ______.
blackhole
giant
nebula
neutron star
protostar
star
super giant
supernova
white dwarf

Explanation:

In stellar evolution, when a large star (with significant mass) exhausts most of its hydrogen fuel, it expands and becomes a super giant. A blackhole, neutron star, or white dwarf are later stages or remnants. A giant is typically for smaller - mass stars, a nebula is the birthplace of stars, a protostar is the early stage of star formation, and a supernova is an explosion, not the stage after hydrogen burning for expansion.

Answer:

super giant