Non-flowering plants are known as what?

Cryptogams are non-flowering plants that reproduce via spores and lack flowers or seeds, including ferns, mosses, and algae. These plants are typically found in shaded, moist environments and play a vital role in ecosystems. Unlike flowering plants (angiosperms and gymnosperms), cryptogams have simpler reproductive structures. Options A (Angiosperms, flowering plants), B (Gymnosperms, seed-producing but non-flowering), and D (Monocots, a type of flowering plant) are incorrect, as cryptogams specifically refer to non-flowering species.