Which of the following is an example of an experimental scientific investigation?

Steps of the scientific method:
1.An observation is made.
2.A problem is defined or a question is asked.
3.A hypothesis is proposed.
4.A controlled experiment is set up.
5.Data is collected and analyzed.
6.Conclusions are made.
7.Process is repeated to verify results.

Examples of Scientific Method:
1.Raspberries did not grow well this year.
2.Why did the raspberries not grow well this year?
3.The raspberries did not grow well because we did not get much rain.
4.Raspberry plants are placed in moderately lit areas all receiving the same amount of light each day. Each plant will receive different amount of water. The size of the berries will be recorded daily once the plants begin to produce berries.
5.The raspberry plants receiving 1 cup of water daily grew to 1/2 " in diameter and those receiving two cups of water grew to 3/4 " in diameter.
6.The raspberry plants receiving the most water grew the biggest. Therefore, the hypothesis is supported that this year's raspberries did not get enough rain.
7.Repeat experiment.

Try and make the question more clear : )

The answer should be geothermal i hope i’m right message me if i’m wrong and i’ll change my answer and fix it for you