Answer:
Liquid
Step-by-step explanation:
Solids have definite shape and definite volume. Since, they have a definite shape, they do not take the shape of the container they are kept in.
Liquids do not have a definite shape but have a definite volume. So, they take the shape of the container they are kept in. You can pour them into a bottle, a glass, or even a polybag. They will take the shape of the container they are kept in.
Gasses neither have a definite shape or a definite volume. So, they also take the shape of the container they are kept in but they do not have a definite volume either.
Therefore, the answer is "Liquid".