What varaible should be controlled before beginning the expirement?

the growth rate of each of the plants/ the relative humidity inside each terrarium

the development pace of every one of the plants/the relative dampness inside every terrarium

one of the most common forms of pain or discomfort we feel during strenuous exercise is a burning sensation in our lungs or muscles that goes away shortly after we cease the activity. this is caused by a build-up of lactic acid.

the answer is c cumulus. cumulus clouds can be seen on a gray and rainy day, because cumulus clouds create thunderstorms. give me brainliest if right.