Ared dwarf is a. the remains of a supernova. b. a hot pulsar. c. a white dwarf that has cooled. d. a small main sequence star. e. a prostar

Option D, a small main sequence star

Explanation:

A red dwarf is just like a small main sequence star as it is formed in the same way as a main sequence star. They are of very small size equivalent to 8 to 50 % of the mass of the sun. They get reduced in size due to  their lower burning temperature as they burn using their hydrogen supply less rapidly unlike other main sequence stars which burns their hydrogen supply rapidly

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.