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: a ship is used for moving people across bodies of water. 
Fact 2: Commonly, a bridge is a structure built to cross a body of water.
[A]: For short distances, bridges can replace ships.


[Q]: Fact 1: chemical splashing can cause harm to humans. 
Fact 2: Humans are animals too.
[A]: chemical splashing can cause harm to animals.


[Q]: Fact 1: threatening behavior by predators causes a porcupine to extend its quills. 
Fact 2: Fishers are one of the few specialized predators on porcupines.
[A]:
A porcupine will extend it's quills when a fisher displays threatening behavior.