The answer is called the foramen ovale. Hope this helps.
The air begins to rise into the atmosphere. When air rises, it cools down and condenses into precipitation and clouds. This is why an approaching low pressure system means an increased chance for clouds, rain, or snow. It is called "low pressure" because as air rises, the air pressure is lower at the surface.
It’s B. “It was doubled...”
Hope this helps... ^^
<span>Model construction.....</span>
