The answer would be 'A', 'To do yoga, I need a shirt, that is loose and comfortable.'
Why: There is an unneeded comma after the word 'shirt'.
Explanation:
<em>hope</em><em> </em><em>this</em><em> </em><em>helps</em><em> </em>
<em>Please</em><em> </em><em>reply</em><em> </em><em> </em>
Simply put, a solar panel works by allowing photons, or particles of light, to knock electrons free from atoms, generating a flow of electricity. Solar panels actually comprise many, smaller units called photovoltaic cells. (Photovoltaic simply means they convert sunlight into electricity.)