The amount of oxygen increased. The amount of oxygen decreased. The oxygen was transformed into water. The oxygen was transformed into carbon dioxide.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A scientist put several different plants in a sealed container. Every hour, she checked the oxygen in the container to see if it changed. How did the oxygen in the container most likely change?
Possibilities:
- The amount of oxygen increased.
- The amount of oxygen decreased.
- The oxygen was transformed into water.
- The oxygen was transformed into carbon dioxide.

The amount of oxygen increased.