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.

[EX Q]: Fact 1: increasing heat causes thermal expansion. 
Fact 2: Motion helps to increase body heat.
[EX A]: motion causes thermal expansion.

[EX Q]: Fact 1: sandpaper is used to smooth wooden objects. 
Fact 2: Scrap wood can be used for cheap wooden bins.
[EX A]: Sandpaper is used to smooth objects made of wood.

[EX Q]: Fact 1: DNA contains genetic instructions for proteins, and RNA helps assemble the proteins. 
Fact 2: RNA RNA, or ribonucleic acid, is a constituent of all living cells and many viruses.
[EX A]:
ribonucleic acid helps assemble proteins.