Direct participant observation claim that the researcher be physically present. This can cause the respondents to alter their actions in order to look in the eyes of the researcher.
Unobtrusive measures are measures that don't demand the researcher to intrude in the research context.
I think the correct answer would be C. It would be restricting water and/or nutrients, instead of supplying ample quantities of both that would not change the results of the experiment. This is because you are still supplying the same amount of nutrients and other things needed by the plant so the ratio of the growth of the plants will still be the same.
The sun provides the energy for plants which starts the whole food chain.
<span>
the human body has to remain a certain temperature. </span>
<span>The sun provides that heat. </span>
<span>I have to drink. </span>
<span>The sun evaporates water so it can be redistributed in the form of rain. </span>
<span>Your life is set by the movement of the sun.</span>
Provides support and energy
