Question

a hertzsprung - russell diagram is shown. which stars are best characterized as having high temperatures and low luminosities? red giants white dwarfs supergiants main sequence

Explanation:

On a Hertzsprung - Russell diagram, white dwarfs are located in the lower left region which indicates high temperatures (on the horizontal axis) and low luminosities (on the vertical axis). Red giants have low temperatures and high luminosities, supergiants have high luminosities, and main - sequence stars have a range of temperatures and luminosities depending on their mass.

Answer:

white dwarfs