Experimental question: how does watching tv during studying affect a student's test grades? which variable is underlined?

I don't see the underline but i'll give the answer anyway

The Independent Variable: watching tv during studying

the Dependent Variable: affect student's test grades

Independent Variable is the variable being tested and Dependent variable is the effect and responds to the change.

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halogen, any of the six nonmetallic elements that constitute group 17 (group viia) of the periodic table. the halogen elements are fluorine (f), chlorine (cl), bromine (br), iodine (i), astatine (at), and tennessine (ts).