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.

Q: 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.

A: When a hemisphere is tilted away from the sun, the weather is colder.
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Q: Fact 1: a delta is formed by deposition of sediment at the mouth of a river by water fanning out. 
Fact 2: Erosion is responsible for wearing down exposed places and depositing sediment in level places.

A: a delta is formed by erosion.
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Q: Fact 1: Menopause occurs when menstruation stops occurring, usually in middle adulthood. 
Fact 2: Today, Menopause is seen more as a gateway to a second adulthood.

A:
A gateway to second adulthood occurs when menstruation stops.
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