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: HIV infects and destroys helper T cells. 
Fact 2: Helper T cells are the critical link in our immune system.
[EX A]: HIV damages our immune system.

[EX Q]: Fact 1: a drought can change the color of an environment from green to brown. 
Fact 2: Cabbage is damn hard to dehydrate without turning brown.
[EX A]: A drought can dehydrate an entire environment.

[EX Q]: Fact 1: water vapor condensing in clouds causes rain. 
Fact 2: Plants wither and die for lack of rain.
[EX A]:
If water vapor doesn't condense into clouds, plants in the wild will wither and die.