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.

Fact 1: Most people can survive only a few days without water. 
Fact 2: Most of the earth's water is liquid.
Most people can survive only a few days without liquid.

Fact 1: having food has a positive impact on an organism 's health. 
Fact 2: And anything edible is food.
Having edible things has a positive impact on an organism 's health.

Fact 1: a cactus stem is used for storing water. 
Fact 2: When the rain stops the cactus is fat because the cactus roots drink the water.

When the rain stops the stem used for storing water is fat because the roots drink the water.