Question

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

Explanation:

• A red giant is a stage before a supergiant, not formed from its explosion.
• A protostar is an early stage of star formation, not from a supergiant explosion.
• A white dwarf forms from a low - mass star (like a red giant) collapsing, not a supergiant explosion.
• When a supergiant (massive star) explodes in a supernova, if the core mass is appropriate, it can collapse to form a neutron star (or a black hole for extremely massive cores).

Answer:

D. a neutron star (assuming the options are labeled A - D as a red giant, a protostar, a white dwarf, a neutron star respectively)