Which option is not a way that heat can flow? (i think this is chemistry)

Explain how the integumentary system plays a crucial role in the ability to maintain homeoestasis

Give the set of reactants (including an alkyl halide and a nucleophile) that could be used to synthesize the following ether: draw the molecules on the canvas by choosing buttons from the tools (for bonds and charges), atoms, and templates toolbars, including charges where needed. ch3ch2och2ch2chch3 | ch3

Avariable that is not being directly tested during an experiment should be