Step 1: Function of Baffles.
Baffles are incorporated into agitated tanks to regulate fluid movement and enhance mixing. A key objective of baffle implementation is to mitigate or avert the formation of a vortex at the tank's center, which would otherwise diminish mixing effectiveness.
Step 2: Evaluation of Alternatives.
- (A) Generate flow patterns: Although baffles contribute to establishing regulated flow patterns, their principal role is to inhibit vortex development.
- (B) Form fine drop suspensions: Baffles are not primarily utilized for creating drop suspensions; their role is to facilitate homogeneous mixing.
- (C) Form fine drop emulsions: This is not a principal function of baffles; emulsification is influenced by agitator speed and impeller type.
- (D) Inhibit vortex formation: This accurately describes the function of baffles, as they prevent vortex formation and promote superior mixing.
Final Answer: \[ \boxed{\text{D) suppress vortex formation}} \]