Answer:
Memory is described as a process of retention of information due to different conditions like meaning and difficulty of the information needed to be learn.
Explanation:
Ebbinghaus discovered that information is usually not remembered within weeks because the lack of training in the memorization process. In his curve he relate two variables: time and percentage of retention of information. The curve is step in the first stages of the process, and after is almost plane.
An actual version displays the curves after several reviews of the information, and is observable how the retention improves when memorization techniques are applied.
In the attached image you could find the curve.
