why does a pumpkin float in water?
-because the water is more dense
-because water is lighter
-because it is heavier than water
-because it is more dense than water

The correct answer is that water is more dense than a pumpkin. Objects that are less dense than water will float in it. Another example of separation by density is how oil and water won't mix.

answer; fosslls and artifacts;

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?