You observe that when you grow serratia marcescens at human body temperature, the resulting bacterial colonies appear white. however, when you grow the same bacterium at room temperature, the colonies that grow are red. this difference in pigmentation is best described as a

Phenotype difference.

Explanation:

The sum of the characteristics of an organism is known as their phenotype. A main difference between genotype and phenotype is that, where a genotype is mostly inherited from the organism’s parents, whereas the case of phenotype is not the same.

A phenotype is mostly influenced a genotype. The phenotype is mostly influenced by genotype and others factors such as lifestyle and environment factors, epigenetic modifications.

answer; i believe the answer is (b) fascism;