Study

When you take the Study Action, you make an Intelligence Check to study your memory, a book, a creature, a clue, an object, 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 when you take this Action, depending on the area of knowledge the Intelligence Check is about.

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)