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.

[Q]: Fact 1: Pressure receptors are found mainly in the skin. 
Fact 2: Skin is the body's largest organ.
[A]: Pressure receptors are found mainly in the body's largest organ.


[Q]: Fact 1: Viruses cause many human diseases. 
Fact 2: Human viruses are created by natural process.
[A]: Something created by a natural process  cause many human diseases.


[Q]: Fact 1: burning fossil fuels increases the carbon in the atmosphere. 
Fact 2: An increase in carbon dioxide, therefore, can cause an increase in the temperature of the lower atmosphere.
[A]:
burning fossil fuels can cause an increase in the temperature of the lower atmosphere.