Astudent is applying the scientific method to a study of the effect of temperature on plant growth. each day he writes down the temperature and plant height measurements in a table in his laboratory notebook. which step of the scientific method does this describe?

Experimentation

Research method is always used to answer every scientific inquiry and in gaining evidential data or knowledge. The scientific method has the following process or at least undergoes the process of
1. Observation 
2. Hypothesis 
3. Experimentation 
4. Interpretation of data 
5. Evaluating the data 
6. Passing and recording the data 

These steps are crucial and the empirical data that these scientists obtain are very important to keep that is why research paper, thesis and dissertations exists.

Because some people pollute water ans waste it

The answer is letter c