Lipids are in a class called fat or lipid solvents.
I'd go for D here. It also fits in with the idea of thermal expansion - as something is heated up, molecules vibrate and maybe collide. they vibrate with bigger amplitudes, so taking up more space, so expanding. maybe
Thallium has got 81 protons
<u>Have a nice days.......</u>
Weather... weather is the obvious answer
