Identify the variable

7

because i guess

Explanan it is rgihg

independent: humidity levels

dependent: height of tree

control: humidity is controlled and the one tree left outside is the control GROUP

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )

when it is at an intermediate population density