gathering the resources for a plant investigation recording how much a plant grew daily for a week predicting how much a plant will grow in one week explaining why a plant grew differently under certain conditions
I gave my students this multiple choice question: Which situation would be considered observation and measurement?

Only one answer is correct among these 4 choices:
- gathering the resources for a plant investigation
- recording how much a plant grew daily for a week
- predicting how much a plant will grow in one week
- explaining why a plant grew differently under certain conditions

Could you tell me which one is correct?

recording how much a plant grew daily for a week