Fill in the blank with the correct option:

Radha is very good at _____ difficult situations.

diffusing

The correct answer is Option (3) → diffusing 

Diffusing means to spread out, or more relevantly in this context, to reduce the intensity or danger of a difficult or volatile situation (like a bomb's fuse). It implies skillfully calming or resolving a tense scenario.

Other Options: 

• Placating and Appeasing mean to make someone less angry or hostile, often by giving in to their demands or by soothing them. These words apply to calming people rather than managing the complexity of a situation itself.

• Concluding means to bring something to an end or to arrive at a judgment or agreement. It doesn't fit the context of managing or improving a difficult scenario.