Final answer:
Barbarians in Dungeons & Dragons gain Primal Path features at level 3. This feature provides unique abilities specific to the chosen path, enhancing the barbarian's combat capabilities and role-playing elements.
Step-by-step explanation:
At level 3, barbarians in Dungeons & Dragons gain Primal Path features, which represent the spiritual journey and calling of the barbarian. Spellcasting abilities, improved unarmed strikes, and increased speed are not what barbarians gain at this level. Instead, the Primal Path provides them with unique abilities and powers that reflect their choice of a specific path, like the Path of the Berserker or the Path of the Totem Warrior, each with its own distinctive benefits and playstyle.