What defines biennials in plant life?

Biennials are defined as plants that take two years to complete their life cycle, which includes growing, flowering, and then shedding seeds. In the first year, biennials typically focus on vegetative growth, establishing roots and storing energy. During the second year, they flower and produce seeds, after which they die. This life cycle strategy allows these plants to take advantage of seasonal conditions for growth and reproduction.

Plants that complete their life cycle in one year are classified as annuals, while perennials are those that can live for multiple years. Thus, the distinction of biennials lies specifically in their unique two-year life span, setting them apart from both annuals and perennials. This is why the selection is accurate in identifying the nature of biennials.