It is glaciation * if this helped you in anyway please be sure to leave a thanks:)
<span>The depression at the top of the volcano is called as a crater. It is roughly circular, and possesses one or more vents. At the time of volcanic eruptions, the magma and the lava are erupted from the crater itself. The crater may also break during eruption, and such craters have a lower rim on one side of the volcano.</span>
It is the isthmus of Suez which is very narrow.
A majority of canada's population live in lake ontario