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: Protozoa can be classified on the basis of how they move. 
Fact 2: For ease of identification, cotton seedlings are classified into the following three categories.
[EX A]: Protozoa can be identified by how they move.

[EX Q]: Fact 1: Coral reefs provide food and shelter to many ocean organisms. 
Fact 2: Oceans are important to life on Earth.
[EX A]: coral reefs are important to earth.

[EX Q]: Fact 1: a planet rotating causes cycles of day and night on that planet. 
Fact 2: The results of a planet's rotation is its length of day.
[EX A]:
a planet has cycles caused by rotation.