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: Carbon may be stored in sedimentary rock for millions of years. 
Fact 2: Sedimentary Rocks One of the commonest sedimentary rocks is sandstone.
[A]: Carbon may be stored in sandstone for millions of years.


[Q]: Fact 1: friction causes an object to lose energy. 
Fact 2: Byproducts of friction Friction is a force acting against motion.
[A]: Force acting against motion causes an object to lose energy.


[Q]: Fact 1: Fungi are the only organisms that can decompose wood. 
Fact 2: Wood was made from trees, and the wood was used in many different ways.
[A]:
fungi can decompose trees.