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.

Example Input: Fact 1: planting trees has a positive impact on an ecosystem. 
Fact 2: Biodiversity encourages a healthier ecosystem.
Example Output: planting trees has a positive impact on biodiversity.

Example Input: Fact 1: camouflage is used for protection by prey against predators. 
Fact 2: Cryptic coloration is a type of camouflage.
Example Output: Cryptic coloration is used for protection by prey against predators.

Example Input: Fact 1: thirst is used to make an animal realize that it needs to replenish its bodily water by the body. 
Fact 2: Common symptoms of dehydration are thirst, fatigue, headache, dizziness and dark, scant urine.
Example Output:
An animal needs to replenish its bodily water when it's dehydrated.