A hyperbole is a figure of speech that uses extreme exaggeration to make a point or show emphasis. In the poem, 'The world might hold a feast' is a hyperbole because it exaggerates the scale of celebration to a global level if words could truly satisfy the heart. For the fill-in-the-blanks, 'tonnes of' exaggerates the large amount of tasks, 'a mile' exaggerates the distance by which the basket was missed, 'a decade' exaggerates the duration of sleep to emphasize extreme tiredness, and 'two seconds' exaggerates how quickly the person will return.