Islam became part of North African cultures due to the geographical location and due to the spread of refugees from Saudi Arabia and other countries in Asia. North Africa was one of the first countries that Islam spread to other than Asia.
That would be correct. Regions in between the two tropics are considered tropical regions and experience tropical weather.
C. there are drought frequently in some areas.
The earth isn't getting bigger even though the continents are spreading apart is because the continents are simply being shifted from one location to another, but no land or mass is being created. The mass of certain parts of the world is simply being displaced from one location on the earth to another or its shape is simply being changed by being pushed up or below the earth's surface.
Alfred Wegener's contemporaries rejected his theory of continental drift because it challenged many established scientific theories at the time, and he lacked a compelling explanation for the cause of continental drift.
