Question

what does the h - r diagram represent? a stars size and distance from the sun. a stars static levels and its brightness. a stars life span and its size. a stars absolute magnitude and temperature.

Explanation:

The Hertzsprung - Russell (H - R) diagram is a graphical tool in astronomy (a sub - field of Physics in Natural Science) that plots stars based on their absolute magnitude (luminosity) and surface temperature. It helps in understanding stellar evolution and classifying stars.

Answer:

a star's absolute magnitude and temperature.