Short description about language generations

What a backup plan that you have created in a event you encounter a situation

Which location-sharing service offers items for users as a gaming component and also allows them to collectively link their check-ins to publish a trip? a. whrrl b. buzzd c. foursquare (this option is wrong i already tried) d. gowalla for plato

Visualizing a game of “tag” to remember the meaning of contagious