Answer:
a)by providing water for irrigation and restoring trees to areas where forests once existed
Explanation:
:)
What experiment though lol
Please put the choices so we can help you futher please and thanks!
Essentially, a control variable is what is kept the same throughout the experiment, and it is not of primary concern in the experimental outcome. Any change in a control variable in an experiment would invalidate the correlation of dependent variables (DV) to the independent variable (IV), thus skewing the results.
1 grass -2 beetle -3 bluebird-4 fox
