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.
Transport of larvae is another important role of ocean currents and processes. Diverse organisms rely on them for the completion of their life cycle, a more efficient exploitation of resources or stocks definition. Their variability is found to be an important component of the ability of ocean currents to impact on marine life.