Answer:
Deductive reasoning
Explanation:
Deductive reasoning can be described as conclusions which are based on logical terms. In deductive reasoning, one or more authentic statements are used to draw a conclusion. A detective reasoning is inclined to go in the same direction as that of the conditionals.
In the above mentioned question, observations proved that Gingko trees lost their leaves at a certain time each year through the United States.This statement or fact was used to draw a conclusion that the Gingko trees present in China might also behave in the same way. Hence, this is an example of deductive reasoning.
