Answer:
One of the properties of transition elements is forming coloured compunds.
This is the encoding stage, the first stage when we receive external input for memory. This can come in the form of visual stimuli, acoustic stimuli and semantic meaning of the event, it is when the situation is going on and the brain/mind is making sense of it, if there is no such event there cannot be an experience to think about in the future. At least semantic meaning must be coupled with the stimuli as we have to ascribe a meaning to the situations we come across, and in some, if not most cases, the three forms are coupled to form the basis of memory.
The other stages are storage and retrieval. The storage stage is related to how long, how well and how a given event interacts with other events in one's life. The last stage is the retrieval stage which is when we try to remember a given stuation.
Rivers are part of landforms such as mountains, prairies and valleys. They can be part of different land forms a the same time.
They all refer to the different types of government systems there are. An example would be that the United States has a a federal government system because both the state governments and national government share equal power.
