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: sweat is used for adjusting to hot temperatures by some animals. 
Fact 2: Perspiration is produced by sweat glands in the skin and is secreted through pores.
[EX A]: Perspiration is used for adjusting to hot temperatures by some animals.

[EX Q]: Fact 1: dew is formed when water vapor condenses over night. 
Fact 2: Dew begins to evaporate when the temperature reaches the dew point.
[EX A]: condensed water vapor evaporates at certain temperatures.

[EX Q]: Fact 1: Evolution occurs in response to a change in the environment. 
Fact 2: Extinction is a natural part or the process of evolution.
[EX A]:
Extinction can occur in response to change in environment.