An enzyme works only with a specific substance like a Fork and knife
Key and lock
On and off switch
A dimmer switch

liquid crystals are matters in a state which have properties between those of conventional liquids and those of solid crystals[1]. liquid crystal is partially ordered and anisotropic. in terms of molecular order, liquid crystal molecules have one-dimensional or two-dimensional long - range order.

b - the respond is innate and varies over time.

good luck!

the answer is c.) there is a warm front in region a and a stationary front in region b.