The correct answer is (A) A long, natural, precipitous, and more or less continuous cliff, normally formed by fracturing of the earth\'s crust. Also, a similar, but artificially constructed, slope to protect a a fortress.

Examples of use:

• The city of Hamilton is nestled between the Niagara Escarpment and Lake Ontario.
  
  
• The wine-growing area of the Niagara Peninsula lies between the lake and the escarpment.