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: condensing means changing from a gas into a liquid by reducing heat energy. 
Fact 2: Heat is the energy of moving molecules.
condensing means changing from a gas into a liquid by reducing moving molecules.

Fact 1: melting means changing from a solid into a liquid by adding heat energy. 
Fact 2: Heat energy from the sun is stored in the earth.
Melting means changing from a solid into a liquid by adding heat from the sun.

Fact 1: a plant requires sunlight to grow. 
Fact 2: Sunlight provides energy for the ecosystem.

Plants require energy to grow.

