Fact 1: Annelids have the amazing capacity to regrow segments that break off. Fact 2: Modern examples are jellyfish, flat worms, and annelid worms. Given the two facts above, what can regrow segments?

Select from the following.
[1]. root growth;
[2]. Exfoliation;
[3]. bacteria;
[4]. roots;
[5]. bears;
[6]. dinosaurs;
[7]. jellyfish;
[8]. birds;
The answer is:
[7].