Question

which object forms when a supergiant explodes? a red giant a protostar a white dwarf a neutron star

Explanation:

When a supergiant explodes in a supernova event, if the core mass is between about 1.4 and 3 times the mass of the Sun, it collapses to form a neutron star. A red giant is a stage in the evolution of a lower - mass star before it sheds its outer layers. A protostar is an early stage in star formation. A white dwarf is the remnant of a low - mass star (not a supergiant) after it has shed its outer layers.

Answer:

a neutron star