Which of the following statements is true regarding perennials?

Perennials are defined by their ability to live for more than two years and typically exhibit a cycle of growth and dormancy that recurs annually. This means that they grow back each year after going dormant, which aligns with the statement that they repeat their growth annually.

The other statements do not accurately describe perennials. For instance, some plants complete their life cycle within one season, but that characteristic applies to annuals, not perennials. The notion that perennials only live for two years is inaccurate since many perennials can live for many years, sometimes even decades. Finally, although some perennials may die back to the ground in winter, they do not die completely; their root systems remain alive, allowing them to regrow in the spring. Thus, the statement regarding their annual growth is the most accurate description of how perennials function in the plant life cycle.