Are physical characteristics of an organism not genetically passed down?

That is false. Physical characteristics of an organism can be genetically passed down.

—Evidence—

An inherited trait is a feature or characteristic of an organism that has been passed on to it in its genes. This transmission of parental traits to their offspring always follows certain principles or laws. The study of how inherited traits are passed on is called genetics.

D. most models represent a real world object in a simpler way

You know how the first one if filled up like the objects do the same but with the other categories