When you take the Study action, you make an Intelligence check to study your memory, a book, a clue, or another source of knowledge and call to mind an important piece of information about it.
The Areas of Knowledge table suggests which skills are applicable to various areas of knowledge.
| Skill | Areas |
| ----------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [[Arcana]] | Spells, magic items, eldritch symbols, magical traditions, planes of existence, and certain creatures (Aberrations, Constructs, Elementals, Fey, and Monstrosities) |
| [[History]] | Historic events and people, ancient civilizations, wars, and certain creatures (Giants and Humanoids) |
| [[Investigation]] | Traps, ciphers, riddles, and gadgetry |
| [[Nature]] | Terrain, flora, weather, and certain creatures (Beasts, Dragons, Oozes, and Plants) |
| [[Religion]] | Deities, religious hierarchies and rites, holy symbols, cults, and certain creatures (Celestials, Fiends, and Undead) |