Could he just laugh out loud at AJ? That probably wasn't a good idea though. Professor Plants might put him in detention from disrupting the class. So instead, he smirked again. "Awesome work! I bring you good luck, don't I?"
..............................
Onto plant number two. Well, technically he had to find the plant first. Adi passed a few that looked healthy. There was no signs at all that something was wrong so he moved on, searching carefully.

Oh look. A sad looking plant with some brown leaves. Adi felt the soil, noting it was dry. "Aguamenti!'' There, little plant. Drink up and be healthy again. And also why not get rid of those ugly, useless leaves?

He positioned his wand to do just that.