Answer:
The correct answer is - slippery slope.
Explanation:
A slippery slope is consider as logical fallacy or informal fallacy that is logic, or critical thinking based in which one action or party carry in the a small fist step to many other steps as like a chain reaction.
It is not always a fallacy, in this case the slippery slope kind of the fallacy as activists get their foot in dogs cats and next will be cow and cjickens and ultimately to the insects as the chain or link reaction.
Thus, the correct answer is - slippery slope.