It serves for protection from predators, as they are more difficult to attack as a unit. (thedressedaesthetic.com)
Young vegetable sprouts contain higher concentrations of potentially harmful chemicals than mature vegetables because baby plants are vulnerable and need more protection from predators. (diagnosisdiet.com)
Fire provides protection from predators and a warmth that may have allowed humankind to extend its geographical reach. (scientificamerican.com)