Which group of plants lacks true roots, stems, and leaves? seedless vascular plants nonvascular plants nonflowering seed plants flowering plants

The correct option will be non-vascular plants (bryophytes).

Explanation:

Non-vascular plants or bryophytes is a group of plants which lack vascular tissues and body organisation which means lacks true roots, stems, and leaves like in liverworts, hornworts and mosses as they were the first plants to be evolved.

Their body is thalloid which means body is not divided into true roots, stems, and leaves. Instead of roots they have hair like structures called rhizoids which help anchor them to the substratum and absorb water and minerals from it.

Thus, non-vascular plants is the correct answer.