Which includes the physical characteristics of an organism?

Answer – Phenotype
 The phenotype includes the physical properties of an organism. A phenotype is the summation of observable characteristics or traits of an organism, usually a product of the interactions between the organism’s genotype and environment. Phenotypic features include the organism’s morphology, biochemical properties, physiological properties, and behavior.

Nimbostratus is the correct answer.
explanation: nimbostratus clouds are the type of clouds that are mostly likely present on gray, rainy day. these clouds produce continuous rain, snow and there is no thundering or lightening either.