Well it's definitely not visible or thermal, so it's <u>electromagnetic waves</u><u>.</u>
Lipids are hydrophobic; They would be insoluble, group together, and float to the top
I would say that the answer is Sn.
C-is a non-metal
Ge-is a metalliod (consists both non-metal and metal)
Si -is a metalloid
Sn- is a pure metal
I think it's A but it might be different from your school and mine
I think it would be a law