Step 1: Analyze the relationship between Milk and Emulsion.
- Milk is an emulsion of fat in water, which is a type of mixture where fat droplets are dispersed in a water-based liquid.
- In a similar way, butter is a type of suspension, where fat is suspended in a liquid.
Step 2: Conclusion.
Therefore, the correct answer is 2. Suspension, as it maintains the same relationship between Milk and Emulsion as Butter and Suspension.

Here are two analogous groups, Group-I and Group-II, that list words in their decreasing order of intensity. Identify the missing word in Group-II.
Abuse \( \rightarrow \) Insult \( \rightarrow \) Ridicule
__________ \( \rightarrow \) Praise \( \rightarrow \) Appreciate