Question

3 what is the name for stars that brighten and dim at regular intervals? supergiants hubbles cepheids supernovas skip 2/10 complete

Explanation:

Cepheids are variable stars that have a regular cycle of brightening and dimming due to pulsations in their size. Supergiants are large - mass stars not characterized by regular brightness changes. There is no star type called "Hubbles". Supernovas are explosive events, not stars with regular brightness variations.

Answer:

C. Cepheids