MOSFET — shows gate (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (pink).
Photo Credit: By Original: Brews ohare Vector: BentSm - Own work based on: MOSFET Structure.png, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=110226970