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: the surface of a beach is formed by mechanical weathering. 
Fact 2: Most beaches are of white coral sand.
answer:
Coral is turned to sand by mechanical weathering.


question:
Fact 1: Minerals are chemical elements that are essential for body processes. 
Fact 2: Healing is a natural process for the human body.
answer:
Minerals are chemical elements that can help with healing.


question:
Fact 1: Viruses contain DNA but not much else. 
Fact 2: Prions are different than bacteria or viruses.
answer:

DNA is not in Prions.