Please tell me the difference between cavity and sensitive teeth?

Cavity is a hole: A cavity is a hole in the tooth caused by bacteria and a food source resulting in acid attack causing the hole in the tooth. Sensitive teeth can be a result of recession of the gums exposing the roots and allowing hot, cold and sweets to affect the tooth, causing discomfort.

Cavity: A cavity is a hole caused by the acids that bacteria release, resulting in the demineralization of the enamel. Cavities are not always painful. Sensitive teeth can be caused by a number of things, including recession, grinding, and attrition, all of which are not cavities.

Cavity ; sensitivity: A cavity is the destruction of tooth surface from acids produced by bacteria that utilize food debris. Not all cavities cause tooth sensitivity. Sensitive teeth can be caused by cavities; erosions; broken or defective restorations (fillings, crowns); occlusal trauma-bruxism; fractured teeth, nerve inflammation; root exposure; tooth brush abrasions, and merely hypersensitive nerves.