plasticity is specific to plants because they cannot move in response to stimuli, or to escape or adapt to a certain environment. if an animal doesn't like the current environment they're in, they'll simply move out of it, but with plants with root systems, it's much more difficult if not impossible, therefore plasticity.

Phenotypic plasticity and adaptation are two ways a population changes in response to changes outside the population. This is how evolution works.

Plasticity means the ability to be shaped and molded.

Plasticity is a physical property.

Plasticity (sociology), is the capacity for positive change in response to environmental demands.