Biology question

What is solution X?

Hi please could i have help on this question? Isn’t osmosis the movement of water so wouldn’t Y be full of water?
Here is the question: https://app.gemoo.com/share/image-annotation/622844845979283456?codeId=v62pJN4m5GWOz&origin=imageurlgenerator&card=622844844448362496
Thanks!

osmosis is the movement of water from a higher water potential to a lower water potential down a water potential gradient. but where is the indication that solution x is water, is there even a mention of water. does it specify water potential? due to diffusion, it is likely that solution x is what fills the space. so yeah answer is solution x I'm pretty sure

But can solutions diffuse, isn’t it only for solids/gases?