Final answer:
The world of Forms according to Plato is unchanging, eternal, and perfect, representing the true and ideal essence of all things, separate from the material world.
Step-by-step explanation:
According to Plato, the world of Forms is indeed unchanging, eternal, and perfect. This stands in contrast to the material world, where things are subject to change and decay. The Forms represent the true essence and ideal versions of all things, which are eternal and do not change over time. For example, while a material rectangle can have imperfections, the Form of a rectangle is a perfect, immutable concept that remains unchanged. Plato's theory of Forms posits a realm of these ideal, unchanging Forms that exist beyond our sensory experiences and physical world.