Question

a very large, bright star whose hot core has used most of its hydrogen. * 1 point main - sequence star nebula giant pulsar

Explanation:

A main - sequence star is in the stable hydrogen - burning phase. A nebula is a cloud of gas and dust. A pulsar is a highly magnetized rotating neutron star. A giant star is large and bright and has used most of its hydrogen in the core, undergoing changes in its structure and energy - generation process.

Answer:

C. Giant