This is because further thinking leads to deeper information processing.
Step-by-step explanation:
The theory on levels of processing explains the focus on the depth of processing involved in memory. It predicts that the information is processed deeply.
Psychology states that the information we write will last long in our memory rather than sitting and listening to the lecture. This is because writing involves thinking which leads to deeper information processing.
Deep processing of information can help in better recalling the information. In this process, the information is deeply analysed and linked with the previous knowledge.