The best answer I see is A
please tell me if I´m right
sorry if i am not
Heat radiation.
This is the form of heat transfer that doesn’t need a medium to transfer through.
That’s how heat from the sun gets to earth, even though empty space is very cold.
The correct answer is solute. I'm pretty sure
A chemical reaction is a process by which atoms or groups of atoms in a particular substance are rearranged from the arrangement within the reactants to a new arrangement within the products.