People with an locus of control believes that outcomes are determined by outside forces such as fate or luck. by contrast, people with an locus of control believe that outcomes are determined by their own actions or efforts.

External, Internal

Explanation:

Locus of control is the major aspect of attribution style theory. These loci determine the attitude of a person. There are two type locus of control

External locus of control: External locus of control determines the external cause for behavior affected such as fate, luck, etc for instance if a student stops trying or put efforts just because he believes in fate or luck, etc.  

Internal locus of control:

Internal locus of control determines the internal factor for contribution in the affected behavior such as self-esteem, self courage. For example, a student gets first prize in the class because he does work hard.  

answer; eliminate parking problems in cities, because a car took up only half as much space as a horse and buggy;