Select the liquid.

 - chalk
 - water in a sink
 - flower petals
 - stuffed rabbit
A flower petal is a solid. A solid has a size and shape of its own. When a butterfly lands on a flower petal, the petal may bend. But the petal will still have its own shape.
Chalk is a solid. You can easily break chalk into pieces. But each piece will still have a size and shape of its own.
A stuffed rabbit is a solid. A solid has a size and shape of its own. When you hold a stuffed rabbit in your hands, the stuffed rabbit still has a size and shape of its own.
The water in a sink is a liquid. A liquid takes the shape of any container it is in. If you move the water from a sink into a different container, the water will take the shape of that container. But the water will still take up the same amount of space.