When western fence lizards express territorial claims, their bellies turn blue. this illustrates the design feature
a. arbitrariness.
b. cultural transmission.
c. productivity.
d. interchangeability.
e. displacement.
f. discreteness.

A. Arbitrariness.

Explanation:

When Western Fence Lizards express territorial claims, their bellies turn blue. This illustrates the design feature arbitrariness.

Arbitrariness is the characteristic of being "by circumstance, instinct, or inclination decided and not by need, intention, or theory." It is often used to refer to a decision taken with little or no specific requirements or constraints. Arbitrary choices are not necessarily the same as those taken at random.

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place.