Which organelle of the plant cell could easily be represented by a large inflated ballon

The vacuole is the answer

they float because they are less dense than the water itself

something denser than water, like a rock, will sink to the bottom

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and colour.

explanation: