Preventative Measures is a bronze medal of Amorphous+, present on the first row.
The Achievement Preventative Measures is obatained by splating 2 glooples whilst they are glomming together.
Awarded for splatting a pair of Glooples while glomming together. Sure, the score is crappy, but you probably saved yourself some heartache later.
The description states that the score for splatting said Glooples is rather low (4 points, 1 for each Gloople, plus the 2x combo, as opposed to 15 points from a Oozle) but it may have saved the player from problems later on.