Step 1: Understand the Yellow Revolution.
The 'Yellow Revolution' refers to the rapid increase in the production of oilseeds, particularly in India. This revolution was largely driven by the Green Revolution's advances in technology and research in the production of crops like mustard and groundnut.
Step 2: Review the options.
- Milk, egg, and fish are not directly related to the Yellow Revolution. These are more relevant to the White Revolution (milk) and other agricultural revolutions.
- Oilseeds, on the other hand, are the main focus of the Yellow Revolution in India, particularly the cultivation of crops like mustard, groundnut, and soybeans.
Step 3: Conclude.
The Yellow Revolution is related to oilseeds, making option (D) the correct answer.
Final Answer:
\[
\boxed{\text{Oilseeds}}
\]