Question

question 3 a star on the instability strip can also be called a... brown dwarf. red supergiant. variable star, such as a cepheid. t tauri star.

Explanation:

Stars within the instability strip on the Hertzsprung - Russell diagram are variable stars. Cepheids are a well - known type of variable star within this strip. Brown dwarfs are sub - stellar objects not in the instability strip. Red supergiants are in a different region of the HR diagram. T Tauri stars are young stars not specifically associated with the instability strip.

Answer:

C. variable star, such as a Cepheid