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.

Input: Consider Input: Fact 1: Specialization occurs when competing species evolve different adaptations. 
Fact 2: Most species are highly specialized for their environments and evolve as the environments change.

Output: Specialization occurs when competing creatures evolve as the environments change.


Input: Consider Input: Fact 1: a delta is formed by deposition of sediment at the mouth of a river by water fanning out. 
Fact 2: Sand is an example of a clastic sediment.

Output: a delta is formed by deposition of sand at the mouth of a river by water fanning out.


Input: Consider Input: Fact 1: oil is formed by layers of sediment pushing down on decomposing algae. 
Fact 2: Earthy sediment of fine particles of rock and soil suspended in and carried by water.


Output: Oil is formed by fine particles pushing down on algae.