For a standard h-r diagram, what are the stars in the lower left region of the diagram?
a. main sequence stars
b. supergiants
c. giants
d. white dwarfs

D. White dwarfs are the stars in the lower left region of the H-R diagram

The correct answer is D ( white dwarfs )

Explanation:

A white dwarf is a thing that stars like the Sun end up after they have depleted their atomic fuel. Close as far as possible of its atomic consuming stage, this kind of star ousts the vast majority of its external material, making a planetary cloud. Just the hot center of the star remains. This center turns into an exceptionally hot white diminutive person, with a temperature surpassing 100,000 Kelvin.

Except if it is accumulating matter from a close-by star (see Cataclysmic Variables), the white diminutive person chills off throughout the following billion years or thereabouts. Some adjacent, youthful white smaller people have been identified as wellsprings of delicate, or lower-vitality, X-beams.

As of late, delicate X-beam and outrageous bright perceptions have turned into a useful asset in the examination of the organization and structure of the thin environment of these stars.

Need a picture to do this

The speed of  sound:   sound travels  at different speeds depending on what it istraveling through. of the three mediums (gas, liquid, and solid)  sound waves travel the slowest through  gases, faster  through  liquids, and fastest  through  solids.