Many people use relative location on a daily basis by using
a. coordinates on a gps-enabled device
b. their mental maps of an area
c. a location's exact address
d. the internet

The right answer is b. their mental maps of an area.

The mind map, which also bears the names of a mind map, idea tree or mindmapping, is a great tool for keeping information. It makes it possible to visualize the links between the ideas and to have a global approach of the subject. The main reason for its effectiveness is that it uses the natural functions of the brain.

20: 5

explanation:

about 20% of the world's population lives in   southwest asia, but on less than 5% of the world's   land area.