The process by which a long term memory becomes durable and stable is called

Consolidation is the process by which a long term memory becomes durable and stable. Memory is our capacity to retain and retrieve information, which makes learning and survival possible for cultures as well as individuals. The long term memory is unlimited capacity whose storage is possibly permanent and information is organized and indexed long term, while short term memory is a limited capacity memory system involved in the retention of information for short periods,

Your answer is water because there is combined mass of water found on, under, and over the surface of a planet. your answer is water.