read the paragraph. then, add the best topic ...
read the paragraph. then, add the best topic sentence. the first looping roller coasters were built in europe. early looping roller coasters had loops shaped like circles. these loops put a lot of force on riders as they flew around upside down. some riders even hurt their necks on the rides. after realizing this, ride makers created loops shaped like teardrops. these loops felt more gentle to riders and caused fewer accidents. roller coaster loops have a special shape to make them safer. amusement parks are known for their rides and games. the first looping roller coasters were built in europe. the teardrop shape of a roller coaster loop is called a clothoid.
Answer
# Brief Explanations:
The paragraph focuses on the history and evolution of looping roller - coaster loops, starting from their origin in Europe and the change in loop shape for rider safety. The first sentence sets the stage for the rest of the details about the loops.
# Answer:
The first looping roller coasters were built in Europe.