Which stars tend to have the greatest range of temperatures and the highest luminosities?

red giants
white dwarfs
supergiants
main sequence

Option D, Main sequence Stars

Explanation:

The stars which are located between the upper left corner  and the lower right corner of Hertzsprung - Russell Diagram have high temperatures and high  luminosity. For example sun. Sun is a form of main sequence star and thus have have high temperatures and high   luminosity.

While giant and red giant stars have low temperature and high luminosity and a super giant has high luminosity but its temperature may vary from low to high temperature.  

White dwarfs are stars with high temperature and low luminosity

 Thus, among all the given options Option D, is the correct answer.

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms