Combine the given two facts to write a concluding fact. Note that there should be some parts of the first and second facts that are not mentioned in this conclusion fact. Your combined fact should be the result of a chain between the two facts. Chains form when two facts connect together to produce a concluding fact. An example of a chain is: "pesticides cause pollution" (fact1) + "pollution can harm animals" (fact2) → "pesticides can harm animals" (conclusion fact). Parts of the concluding fact overlap with the first and the second fact. To construct such a  concluding fact, a useful way is to borrow the subject from one fact and the ending conclusions from another fact.

Fact 1: if heat is conducted to an object then that object will become hot. 
Fact 2: Insulation helps to block conduction of heat.
Insulation helps block conduction to an object.

Fact 1: adding salt to a liquid decreases the melting point of that liquid. 
Fact 2: A low melting point will lower the heat needed.
adding salt to a liquid lowers the heat needed to melt it.

Fact 1: Populations of viruses do not grow through cell division because they are not cells. 
Fact 2: Cells, the basic units of every living organism, proliferate by binary division.

Viruses do not proliferate via binary division.