Answer:
some sort of water system, (a river/groundwater/purification plant ect.)
Explanation:
Succession is a thing that happens to forests or other ecosystem landscapes.
The given blank can be filled with implicit memory.
The implicit memory is a type of long term memory. This type of the memory is used and acquired unconsciously. This can affect the thought and the behavior of the person.
In the given case, once a person learns to ride a bicycle, whenever he or she will ride a bicycle will start paddling and balancing the handle and tires, even if it is unknown to the person that he is doing all these things.
Answer:
natural selection I guess
