__ Effect; Building of Momentum, Amplification
Puzzle 16 of Puppy Love Pack
Question is: __ Effect; Building of Momentum, Amplification
and the answer is: SNOWBALL
Word Meaning:
SNOWBALL — A ball of snow, usually one made in the hand and thrown for amusement in a snowball fight; also a larger ball of snow made by rolling a snowball around in snow that sticks to it and increases its diameter.
Definitions from Wiktionary.