instruction:
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.
question:
Fact 1: fossil fuels are formed from dead organisms over time. 
Fact 2: And that energy is generated by burning fossil fuel.
answer:
Burning dead organisms can create energy.


question:
Fact 1: Insects generally have two pairs of wings for flight. 
Fact 2: Flight enables many insects to move quickly away from predators.
answer:
insects generally have two pairs of wings to move quickly away from predators.


question:
Fact 1: heating an egg causes a chemical reaction in the egg. 
Fact 2: The heat causes the atoms to rearrange.
answer:

A chemical reaction in an egg causes atoms to rearrange.