This is what the user sees and works with when using the computer..Different types are Graphical user interface, Command line interface and Manual driven interface
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Graphical User Interface
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when the window is user friendly then we can easily use the user
interface.
Which one of the following is a source of chemical weathering a The abrasion of running water b water freezing in the cracks of exposed rocks c the effects of acid from decaying animals d the growth