TASK DEFINITION: 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.
PROBLEM: Fact 1: Reproduction is the process by which organisms give rise to offspring. 
Fact 2: Sex equals reproduction.

SOLUTION: sex is the process by which organisms give rise to offspring.

PROBLEM: Fact 1: Scientists who find and study fossils are called paleontologists. 
Fact 2: Fossil fuels are the fossilized remains of prehistoric animals and plants.

SOLUTION: paleontologists study the remains of plants.

PROBLEM: Fact 1: an image in a mirror is formed by reflecting light. 
Fact 2: Light is all our eyes can really see.

SOLUTION:
mirrors can be seen with our eyes.