Study

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.

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)