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: a plant requires water to grow. 
Fact 2: Plants respond to fertility and watering by growing larger and producing more blooms, but they will grow and bloom well with just average conditions.
A plant will grow larger and bloom.

Fact 1: when a hemisphere is tilted away from the sun , that hemisphere receives less direct sunlight. 
Fact 2: The less direct the sunlight, the colder the weather.
When a hemisphere is tilted away from the sun, the weather is colder.

Fact 1: sand dunes are formed by the wind transporting and depositing sand. 
Fact 2: Winds are caused by pressure differences.

sand dunes can be formed by pressure differences.