Which name is given to the observable features of an organism ?
a) Alleles.
b) Genes.
c) Genotype.
d) Phenotype.

D. Phenotype

Explanation:

Phenotypes are observable characteristics of an organism, like seeing that a human has brown hair, freckles, etc.

Hope this helps :)

not only is it colder, it also becomes darker, less salty, and more dense.