TASK DEFINITION: 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.
PROBLEM: Fact 1: when a cooler object touches a warmer object , thermal conduction occurs. 
Fact 2: Since heat moves from where it's warmer to where it's colder, the thermal energy in the air transfers into the cooler liquid.

SOLUTION: heat moves from a warmer object to a cooler object when the two objects touch.

PROBLEM: Fact 1: Temperature falls from lower to higher altitudes. 
Fact 2: Temperatures vary with altitude and season.

SOLUTION: temperatures vary depending on season.

PROBLEM: Fact 1: a mutation in the sex cells of a parent can cause a new trait to appear in the parent 's offspring. 
Fact 2: Upon reproduction, offspring are subject to mutation.

SOLUTION:
mutation causes new traits during reproduction.