Quotation marks, also called 'inverted commas', are of two types: single and double. British practice is normally to enclose quoted matter between single quotation marks, and to use double quotation marks for a quotation within a quotation:
The oceans absorb the sun's heat, transferring it to the atmosphere and distributing it around the world via the ever-moving ocean currents. This drives global weather patterns and acts as a heater in the winter and an air conditioner in the summer.
A: Ocean currents affect climate in several different ways: they regulate temperature, help to stabilize atmospheric conditions in land regions and bring nutrients to marine environments. Ocean currents form in large and small oceans and seas around the world.