Me . i really don't know the answer to this.

Your dependent variable "depends" on the independent variable. In this question your dependent variable is going to be plant growth. Your plant growth "depends" on the amount of sugar in the water. 

Therefore, your independent variable is the amount of sugar in the water. 

I hope I was able to help. Best of luck.

The amount of water if you write a sentence or it gives you the option that should be the amount of water

I would make my own giant and it would have long hair and live i the mountains, and it needs the cold weather to survive. Some of the things that it eats is the things humans eat like duck, chicken, ham, and uh yeah.