Ahmed makes a Venn diagram to compare active transport and passive transport across the cell membrane.

Which label belongs in the region marked X?
Uses energy to work
Moves from high concentration to low concentration
Moves across the cell membrane
Is a form of diffusion

The answer is moves across the cell membrane  is a form of diffusion.

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?

what? ? i don't get it