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


question:
Fact 1: Protozoa can be classified on the basis of how they move. 
Fact 2: For ease of identification, cotton seedlings are classified into the following three categories.
answer:
Protozoa can be identified by how they move.


question:
Fact 1: plasma is formed by electrons separating from atoms in stars. 
Fact 2: Plasma Defined Plasma Defined A plasma is an ionized gas.
answer:

Ionized gases are formed in stars.