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.

Fact 1: being burried under soil and mud changes peat into coal through extreme heat and pressure in a swamp over a long period of time. 
Fact 2: Most coal is fossil peat.
fossils turn into coal over time.

Fact 1: an animal usually requires a warm body temperature for survival. 
Fact 2: Dormancy is an adaptation that improves the chances of surviving until warm temperatures return.
Animals use dormancy to improve the chances of surviving.

Fact 1: Mutation creates new genetic variation in a gene pool. 
Fact 2: Fertilization increases genetic variation.

Mutation and fertilization have similar effects on the gene pool.