One characteristic of all living things is that they a. develop organ systems
b. produce identical offspring
c. maintain internal stability
d. synthesize only inorganic matter

The choices for the above question are:
a.single gene-pair inheritance.
b.shared environmental influence.
c.gene-environment interaction.
d.polygenetic inheritance.

The concept which is defined is gene-environment interaction. The answer to your question is C. I hope this is the answer that you were looking for.