Final answer:
An arboretum is a plot of land where a variety of trees are grown for study or display, serving educational and scientific purposes, much like a living library or laboratory for tree species.
Step-by-step explanation:
A plot of land designed for the study or display of various tree species for educational and scientific purposes is called an arboretum. An arboretum is not merely a park or a landscape feature; it operates similarly to a laboratory, where diverse kinds of trees are meticulously grown, observed, and maintained to create a living collection that supports research, education, and conservation. Unlike forests that are naturally occurring or orchards dedicated to fruit production, an arboretum serves as a living library of trees, often including rare or unusual species, organized according to scientific, educational, and aesthetic principles. As an educational facility, an arboretum significantly contributes to our understanding of plant biology, ecology, and conservation.