Answer:
one word is elementits in the last column, spelled backwards
I would answer your question but i think you wanted to add options. next time you can just screen shot and actually i think you still can by pressing the edit button. And there are several types of wedges you could be talking about mechanical, frost, salt, etc.
You need to be a bit more specific. but i would be more than happy to answer your question. :)
Answer:
The correct answer is - option B) humidity.
Explanation:
Independent variable is the variable in a scientific experiment that can be modify or change in order to find out the response and analyse the response of dependent variable.
In this experiment the independent variable is humidity as it is changed in order to find out and study plant growth response by the effect of humidity.
Thus, the correct answer is - option B) humidity.