The air in the beach ball escaped. The air in the beach ball became a liquid. The type of air in the beach ball changed. The shape of the air in the beach ball changed.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A student blew air into a beach ball and sealed it. She then pushed on the middle of the beach ball. What happened to the air inside the beach ball?
Possibilities:
- The air in the beach ball escaped.
- The air in the beach ball became a liquid.
- The type of air in the beach ball changed.
- The shape of the air in the beach ball changed.

The shape of the air in the beach ball changed.