The correct answer is regression.
The child is regressing to a previous age when he used to wet the bed. He is now six years old, so he is supposed to be old enough not to wet the bed anymore, which was the case until his baby brother was born. Now the older child feels neglected and starts regressing to an earlier age in order to be noticed by his parents again.
Most of Maghreb (North Africa) resembles Arabian peninsula the most. That is the Physical geography part. Egypt from the earliest times was demographically, ethnically, culturally & socially contiguous with the Levant (Asia's West Coast on the Mediterranean Sea) from where the influence spread west till the Atlantic Ocean. Then (in those times) they weren't aware that theirs was a different continent (as most American school children think now, "if they are from different continents they should be different").<span> </span>
The baby boom is also called Post-World War II baby boom, and this already reveals the cause: after the war the economy was raising again, after hard times, and people were optimistic about the future
