Selena would like go back to a page that she visited recently. she should use the

The back button of the navigation bar

Explanation:

The back and forward buttons are standard on the many web browsers. The navigation bar is the same place where you type your URLs. In this case, Selena would use the back button to go back to an active window she had previously visited. It helps you move backward in the same order you previously made your visits.

there is no universally accepted definition of art. although commonly used to describe something of beauty, or a skill which produces an aesthetic result, there is no clear line in principle between (say) a unique piece of handmade sculpture, and a mass-produced but visually attractive item. we might say that art requires thought - some kind of creative impulse - but this raises more questions: for example, how much thought is required? if someone flings paint at a canvas, hoping by this action to create a work of art, does the result automatically constitute art?