Africa and South America were part of the same continent called Gondwana, formed around 500 million years ago and it was a <em>supercontinent</em><em> </em>in the Southern part of the world, while the other one, in the North, was Laurasia. Around 175 million years ago, the split between the African and South American continent began, creating a part of the Atlantic Ocean because of this. Their shores are complementary, meaning that they match each other.
An anticlimax is a disappointing (or unsatifying) ending to an otherwise exciting series of events. Example: think of an action movie that just ends without wrapping up the loose ends or leaves too many unanswered questions.
The purpose of connecting sentences, ideas, and paragraphs is to guide the reader along the path you develop. That is a solid way to prove an argument. An essay writer does not leave it to the reader to make assumptions or to fill in the blanks.