Final answer:
The reasoning form exemplified by the statement about snow and clouds is deductive reasoning, as it provides a logical sequence from a general statement to a specific conclusion that must be true if the premises are true.
Step-by-step explanation:
The form of reasoning used in the statement 'If it is snowing, then there are clouds in the sky. It is snowing. Therefore, there are clouds in the sky.' is known as deductive reasoning. This is because the argument structure follows a logical progression where a general statement leads to a specific conclusion. The premises provided give a sufficient condition for the conclusion to be true. This is a classic example of a valid deductive argument, where if the premises are true, the conclusion must also be true.