One major difference between the inner and outer planets is that the outer planets are much denser. outer planets are much larger. inner planets have thicker atmospheres. inner planets have fiercer storms

it's c. (to reduce the greenhouse effect/carbon gasses)

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.