Above information helps you bro.
The land of airplane gear of an airplane can be idealized as the spring-mass-damper system shown in fig. 3.52. if the runway surface is described
B. An element.
Remember, the Peroidic Table of Elements.
A map can be used in geography.
An inch can be used in mathematics.
A thermometer can be used in wheather.
But an element is the most likely choice.