The correct answer is B. No definite shape
Explanation:
Gas and liquid are two different states of matter. In these states, particles move more freely than in a solid-state. Due to this characteristic, in both liquids and gases, there is not a defined shape; instead, liquids and gases adapt to the container or space where they are, although gases occupy all the space in a container. Besides this, they differ because gases do not have a defined volume as this can change through compression, while liquids have a defined volume. Thus, one similarity between gases and liquids is that they do not have a defined shape (option B).
