Here's why:
* Phenotype: A phenotype refers to the observable physical or biochemical characteristics of an organism. It's the outward expression of an organism's genes, influenced by both genetics and environmental factors.
* Eye color, hair color, and nose shape are all physical traits that are visible and can be easily observed. They are determined by a combination of genes inherited from parents.
In contrast, the underlying genetic makeup that determines these traits is called the genotype.